vip300 protection relay for ringmaster mgmv5477
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VIP 300 protection relayfor Ringmaster
2
Providing a wide range ofselectivity and quality of supply
The VIP 300 is a three phase overcurrent and earth faultprotection relay, providing protection for the network andequipment. It is an integral part of the highly successfulRingmaster range of secondary distribution switchgear.The main function of the relay is to detect overcurrentand earth faults within the network and to trip the circuitbreaker.
VIP 300 protection relayProtection relay
Self poweredreliability
The VIP 300protection relay is aself poweredmicroprocessorbased unit whichrequires no externalDC power source orbatteries, making itthe ideal solution forlocation in remoteareas or whereauxiliary supplies arenot available.
3
VIP 300 protection relayBenefits
Reliability
The relay has a self monitoring device anddiagnostic routine which constantly checksthe operation of the relay automatically.
Ease of use
VIP 300 has improved operation and control,with the relay settings being clearlydisplayed on the front panel.Manual reset flags show separate ‘tripped onfault’ for either overcurrent or earth faultconditions.
Flexibility
There are a wide range of settingsavailable. The IDMT (inverse definiteminimum time) characteristics can beadjusted to grade the relay with otherdevices. Fast power up ensures that whenswitched on to a fault the power up timeis less than �30ms.
Testing
The VAP6 hand held test unit, isavailable to provide a simple check ofthe integrity of the relay and can alsoperform trip tests. Circuit breaker “tripinhibit” facility allows the relay to betested without tripping the circuit breakerusing the VAP6. Secondary injection canbe carried out using conventional testequipment.
4
VIP 300 protection relayFeatures
Product CE2, RN2c, RE2c CE6, RN6c
Application transformer ring feeders incomers
200 - 1600kVA 400 - 3800kVA 1900 - 12000kVA
Time Fuse Link
IDMT VIP 300
*Note: a protection coordination study may be necessary to verify the type of protection. Consult your local Merlin Gerin sales engineer if in doubt.
Protection selection guide
Primary current (A) 10 20 80 100 125 200 630
Equivalent transformer rating at 11kV 200kVA 400kVA 1600kVA 1900kVA 2400kVA 3800kVA 12000kVA
Units Application protection
Transformer protection Time Fuse Link
IDMT - VIP 300
Feeder protection IDMT - VIP 300
CE2CN2RN2c,
CE6RN6c
Protection application guide
■ Pick-up current ranges:RN2c, RE2c, CN2, CE2overcurrent : 20A -200Aearth fault : 2A-160A.CE6 and RN6covercurrent : 40A - 400Aearth fault : 4A to 320A.
overcurrent : 80A - 800Aearth fault : 8A to 640A.
■ Hardened electronicsCertified EMC performance to IEC 255and EN 50061, EN50082.
■ Separate overcurrent and earth faulttrip indication.
■ Flashing LED’s indicate when the relaypick-up setting has been exceeded(creep test).
RE2c
5
The Ringmaster range of switchgear comprises non-extensible andextensible ring main units, extensible switches and circuit breakersup to 630A for medium voltage systems up to 13.8kV.
Ringmaster - the total solution
RN2c - 200A non-extensible ring main unit incorporating 2 faultmake/load break switches and a tee-off circuit breaker (transformermounted or free standing).
RE2c - 200A extensible ring main unit incorporating 2 faultmake/load break switches and tee-off circuit breaker (transformermounted or free standing). Available early 2000.
RN6c - 630A non-extensible ring main unit for freestanding networksectionalising.
CN2 - 200A non-extensible circuit breaker (transformer mounted orfree standing).
SN6 - 630A non-extensible switch (transformer mounted or freestanding).
CE2 - 200A extensible circuit breaker (switchboard mounted).
CE6 - 630A extensible circuit breaker (switchboard mounted).
SE6 - 630A extensible switch (switchboard mounted).
MU2 - 200A feeder metering unit (circuit connected, transformermounted or free standing).
Easergy - Telecontrol cabinets (up to four switch control, free-standing, wall or switchgear mounted).
For further details please refer to the Ringmaster range selection guide.
VIP 300 protection relayProtection relay
■ Time Fuse Link
In addition to the VIP 300 relay, Ringmasteris also available with Time Fuse Linkprotection as a low cost option fortransformers. Further details are given in theRingmaster range selection guide.
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7
VIP 300 protection relayTechnical specification
Content Page
Use and settingsRelay front panel 8
Curve selection 9
Operating rangesSelection principle 10
ApplicationsRequired setting
information 11
Setting examples 12
Ex. 1 - Ring main unit
protecting an 11kV,
1MVA transformer 13 - 14
Ex. 2 - 200A circuit breaker
protecting an 11kV,
2MVA transformer 15
Ex. 3 - 630A circuit breaker
protecting a radial feeder
of 4MVA at 11kV 16 - 17
Ex. 4 - 630A circuit breaker
protecting a radial feeder
of 8MVA at 11kV 18
Technicalcharacteristics 19
IDMT & DT trippingcurvesStandard inverse 20
Very inverse 21
Extremely inverse 22
Definite time 23
8
VIP 300 protection relayRelay front panel
VIP 300
0.40.20.60.1
0.90.05
1.50.03
to>>(s)
129156
204
off3 (x Is)
0.20.150.30.1
0.40.07
0.60.05
0.40.20.60.1
0.90.05
1.50.03
t>>(s)
129156
204
off3 (x Ios)
2.11.82.41.5
2.71.2
31 (s)
0.20.150.30.1
0.40.07
0.60.05
to>(s)
curve selection
DT onlyIo> Io>>
I>>
Is
4842 5636 64
30 7224 80
20 90100(A)
Ios
2416 3212 40
8 504 60
2 7080(A)
I>
I>
trip
reset
trip
Io>
earth fault
x10
sensors:200/1 4509996A0VIP300LH range: x2
minimum operatingphase current: 20A
phaseovercurrent
x1
EIVISI
offRI
DT (s)
2.11.82.41.5
2.71.2
31 (x Is)
x10
x1
VAP6 test plug
EIVISI
offRI
DT
DT only
curve selection
t>
warning
not timemultiplier
see table
warning
not timemultiplier
see table
VIP 300Settings
Equivalent TimeMultiplier
t>
0.050.070.10.150.20.30.40.050.60.070.10.150.20.30.40.6
to>
x1x1x1x1x1x1x1
x10x1
x10x10x10x10x10x10x10
SI
0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02
VI
0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00
EI
0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43
1 2 3 4 5 7 8 6 9 10
C B A
11 12 13 14 15 17 18 16 19 20
D E
Phase overcurrent setting1. Phase setting area
(upper half of relay front panel).
2. Red LED phase overcurrentpick-up indicator.
3. Phase overcurrent trip indicator.
4. Phase overcurrent setting Is.
5. Choice of low set curve type I>.
6. Low set pick-up (DT only) I>.
7. Low set time delay t>. (@10Is)
8. Multiplying factor (low set).
9. High set pick-up I>>.
10. High set time delay t>>.
Earth fault setting11. Earth fault setting area
(lower half of relay front panel).
12. Red LED earth fault pick-upindicator.
13. Earth fault trip indicator.
14. Earth fault setting current Ios.
15. Choice of low set curve type Io>.
16. Low set pick-up (DT only) Io>.
17. Low set time delay to>. (@10Ios)
18. Multiplying factor (low set).
19. High set pick-up Io>>.
20. High set time delay to>>.
Other functionsA. Current setting scale label.
B. Current transformer andrange information.
C. Indicator reset button.
D. Minimum operating current.
E. VAP6 test plug socket.
9
VIP 300 protection relayCurve selection
Phase overcurrent setting:
The numbers indicated below are thoseof the setting switches (refer to thediagram of the front panel on page 8)The letters indicate the curvecharacteristic as shown opposite.
Phase overcurrent setting:
F ■ Setting current Is (4)
G ■ Type of low set I> curve (5)IDMT: SI, VI, EI, RI.Definite time: DT
H ■ DT low set pick-up I> (6)This setting is only active for thelow set DT curve selection (asshown). If IDMT curves areselected this switch is disabled,as SI,VI, EI, low set pick-up isfixed at 1.2 Is.
J ■ Low set time delay t> (7)and multiplier (8)
K ■ High set I>>(9)
L ■ High set time delay t>>(10)
Earth fault setting:
The principle is the same as for phaseprotection.
Set:
F ■ Setting current Ios (14)
G ■ Type of low setting Io> curve (15)
IDMT: SI, VI, EI, RIDefinite time: DT
H ■ DT low set pick-up Io> (16)This setting is only active for thelow set DT curve selection (asshown). If IDMT curves areselected this switch is disabled,as SI, VI, EI low set pick-up isfixed at 1.2 Is.
J ■ Low set time delay to> (17)and multiplier (18)
K ■ High set Io>>(19)
L ■ High set time delay to>>(20)
Operation:
The high and low set elementsoperate separately. The tripping orderresults from the “logical OR” betweenthe two settings.
Is
SI, VI, EI RIG
F
J
K
Lt>>
1.2 Is 10 Is I>>
t>
IDMT curve selection
DT curve selection
Is
DT G
Lt>>
I>
I>1.2 Is I>>
F
J
K
H
t>
t
t
10
Selection principle
VIP 300 protection relayChoice of operating ranges
The operating range for the VIP 300 is dependent on the current transformer(also referred to as sensor) used, which is determined by the Ringmaster panel typechosen from the selection guide. The relay itself can then be set to either the x2 orx4 range as detailed in the table below.
Sensor CTs available:
Ringmaster 800/1, 400/1 or 200/1 (see Ringmaster selection guide)
Range specified:
VIP 300LH x2 or x4 range
SETTING RANGES x2 x4
Note: Connection must be made to terminals 2, 4, 6 and 8 or terminals 1, 3, 5 and 7for the x2 or x4 setting ranges respectively.
Note: MITOP - trip coil.
VIP 300 IDMT RELAY
P1
P2
S1
S2
C11
MITOP - ITC
S2
CT1
52
P1
P2
S1
S2
P1
P2
S1
S2
C114
5
6
7
8
9
10
C31 C31
C51 C51
C10 C70
C30
C50 C70
C90
8
7
6
5
4
3
2
1
x4 range40A,80Aor 160Aminimumoperatingcurrent
950/51
50N/51N
10
11
12
13
14
1516
0v
YR B
K8 (-Ve)
K7 (+Ve)
C7
1
x2 range20A, 40Aor 80Aminimumoperatingcurrent
1
2
-
-
3
4
Ringmaster range Application Range min operating Protection Current Setting range Example
current Minimum Maximum
RN2c, RE2c, CE2, Transformer x2 20A Overcurrent 20A 100A CN2, 200/1A CT protection earth fault 2A* 80A
x4 40A Overcurrent 40A 200A
earth fault 4A* 160A
RN6c Transformer/ x2 40A Overcurrent 40A 200A
400/1A CT Feeder earth fault 4A* 160A
Protection x4 80A Overcurrent 80A 400A
earth fault 8A* 320A
CE6, RN6c Feeder x2 80A Overcurrent 80A 400A
800/1A CT protection earth fault 8A* 320A
x4 160A Overcurrent 160A 800A
earth fault 16A* 640A
*The earth fault pick-up can be set below minimum operating current but a load current > minimum operating current needs toflow previous to a fault in order to ensure the relay is powered up.
11
VIP 300 protection relayApplication
Selection principles
Required setting information.Prior to making any settings, you need to know:
Ir - rated current of installation to be protected.
Current transformer:The current transformer is specified by the panel type chosen from the Ringmaster
catalogue.
i) Choice of range:To select the minimum operating current and therefore required primary amp
operating range two factors can be considered.
- The load current and any possible allowable overload
(typical allowable overload for transformers is 30%)
- The earth fault level
(typically set at 0.4 times rated current Ir)
It is appropriate to choose the range which will operate above the minimum
operating current. Effectively the relay can be operated below this level, see
minimum operating note.
ii) Choice of curve*:There are 5 types of curve available.
SI - Standard inverse, mainly used for feeder applications.
VI - Very inverse, mainly used for transformer applications.
EI - Extremely inverse, mainly used for transformer applications.
DT - Definite time, used for timed applications.
RI - Special applications (consult Merlin Gerin).
iii) Choice of current setting Is and Ios*:Consider assumptions made in i) and choose the nearest appropriate current
setting.
iv) Choice of low set time delay t> and to>*:Desired operating time depends on the interval to achieve grading with upstream
and downstream devices at the maximum and minimum fault levels. Between IDMT
characteristics a grading margin of 0.4s is desired. Between an IDMT characteristic
and a LV protective device a grading margin of 0.25s is considered acceptable.
v) Choice of high set current setting I>> and Io>>:I>> and Io>> are multiples of Is and Ios respectively. The high set element has the
advantage of allowing the protection upstream to reduce its operating time at high
fault levels. Grading is carried out at the instantaneous current setting and not at the
maximum fault level, therefore it can be achieved at lower currents enabling the
upstream device to operate quicker at the maximum fault level.
vi) Choice of high set time delay t>> and to>>:Depending on grading required upstream and downstream.
*Depends on characteristics of devices upstream and downstream. The selection
principles only act as a guide to set up the VIP 300, a proper protection selectivity
study should be carried out to set up device settings.
12
VIP 300 protection relayApplication
Setting examples
Typical examples will be given.
Consider 4 examples:
1 : RN2c unit protecting a typical MV/LV 1MVA transformer.
2 : CE2 unit protecting a typical MV/LV 2MVA transformer.
3 : CE6 unit protecting a radial feeder with 4 RN2c units fed from it each feeding
1HVA transformers.
4 : CE6 unit protecting the same radial feed for which a planned extension is to
make a ring feeding 8 RN2c units, each feeding 1HVA transformers.
Example schematic
13
[ ]
[ ]
VIP 300 protection relayApplication - transformers
Example 1An RN2c circuit breaker equipped with a VIP 300 feeds a 1000kVA transformer.The transformer details are as follows:Power rating = 1MVAPrimary voltage = 11kV% Impedance Zt = 5%From this the rated current of the transformer can be calculated:
Ir = Power = 1000 x 103 = 52.5A
voltage x �3 11000 x �3
The HV fault level (MVAs) will be assumed to be 250MVA. The three phase LV fault levelcan be calculated:
IFLV = 11kV x 1 A @ 11kV �3 112 + 112 x Zt MVAs MVAT 100
IFLV = 11kV x 1 A = 972A @ 11kV �3 112 + 112 x 5 250 1 100
The circuit breaker is fitted with 200/1A CTs. From the above the following will now bedetermined.
Choice of range:The setting ranges available for the minimum operating currents are:
x2 range, minimum operating current = 20A setting overcurrent 20A-100A earth fault 2A-80Ax4 range, minimum operating current = 40A setting overcurrent 40A-200A earth fault 4A-160A
By considering the minimum operating current of 20A (x2 range) then the transformer ratedcurrent is mid-point within the primary amp range. Hence there is room to consider possibleoverloads and earth fault levels.Range chosen x2 minimum operating current = 20A
Choice of curve:In this case we are dealing with a MV/LV transformer. For this application the type of curveselected for overcurrent protection is usually either a VI or EI characteristic. These curvesprovide quicker operating times at higher fault currents to allow better protection of thetransformer primary. The selection of these curves also helps in co-ordinating with the LVprotective device on the secondary side of the transformer.For earth fault protection the curve selected is usually a definite time characteristic and isnormally set quite low (typical 40% or 0.4 times the rated current).I> setting VIIo> setting DT
Choice of current setting:Overcurrent IsIf a typical overload of 30% is considered for the transformer.Is = overload x Ir = 1.3 x 52.5 = 68AChoose the nearest available setting above this in primary ampsIs setting 72A.Earth fault IosConsider a typical earth fault setting of 40% of transformer rated current, 20.8AIos setting 24A DT only setting 1
14
[( ) ]
[( ) ]
[( ) ]
VIP 300 protection relayApplication - transformers
Choice of low set time delay:Overcurrent t>The time setting corresponds to the actual relay operating time at 10 x Is, in this case 720A.The desired operating time for the relay is determined by the upstream and downstreamprotective devices. In this example the downstream device is on the LV network, we thereforehave to ensure adequate time is given between the two devices upto maximum LV 3ph faultlevel. It is assumed the LV device is set at 0.1s at the maximum fault level and therefore thedesired operating time for the VIP 300 is given as follows:
Desired operating = operating time + grading margin between = 0.1 + 0.25time of LV device devices
(see selection principles)If this value is used as t in the formula for the VI curve selected (see page 21)
t = 13.5 x t> desired time t = 0.35 If -1 1.5 If (fault level) = 972A
Is Is (current level) = 72At> = ?
To find t> rearrange formula
t> = If -1 x t x 1.5 Is 13.5
t> = 972 -1 x 0.35 x 1.5 72
13.5
By inserting the values into the formula t> = 0.486Select 0.5 as nearest low set time delay (0.05 and x10 multiplier). The actual operating timecan now be found by placing back into the original formula.Actual t = 0.36t> 0.05s x10Earth fault to>The earth fault element can be set as low as possible as there is no need to grade with thedevice on the LV of the transformer. It is set at 0.1 to avoid spurious operation under transientconditions such as magnetizing inrush.to> 0.1s x1
Choice of high set current setting:Overcurrent I>>The high set instantaneous element is a multiple of the setting current Is> and in this case isgraded with the LV protective device. The maximum fault current the LV protective device willsee is the 3ph LV fault level, 972A. Hence above 972A the high set can be implemented.Instantaneous = 15 x 72 = 1080 which is above 972AI>> = 15Earth fault Io>>The high set earth fault element is a multiple of the setting current Ios>. The high set elementfor the earth fault is not used in this case and should be set in the off position.Io>> off
Choice of high set time delay:Dependent on upstream and downstream protection. In this case the phaseovercurrent high set time delay t>> is set to the minimum 0.03 as downstreamgrading has been accounted for. Earth fault high set time delay to>> isdisabled as high set is in off position.t>> 0.03 to>> 0.03 (disabled as high set is in off position).
100
1000
10
1
0.1
0.011 10 100
t>
10 x Is
t>>
1.2 x Is
Overcurrent
Earth fault
100
1000
10
1
0.1
0.010.1 10 1001
to>
Io>
VIP 300
0.40.20.60.1
0.90.05
1.50.03
to>>(s)
129156
204
off3 (x Is)
0.20.150.30.1
0.40.07
0.60.05
0.40.20.60.1
0.90.05
1.50.03
t>>(s)
129156
204
off3 (x Ios)
2.11.82.41.5
2.71.2
31 (s)
0.20.150.30.1
0.40.07
0.60.05
to>(s)
curve selection
DT onlyIo> Io>>
I>>
Is
4842 5636 64
30 7224 80
20 90100(A)
Ios
2416 3212 40
8 504 60
2 7080(A)
I>
I>
trip
reset
trip
Io>
earth fault
x10
sensors:200/1 4509996A0VIP300LH range: x2
minimum operatingphase current: 20A
phaseovercurrent
x1
EIVISI
offRI
DT (s)
2.11.82.41.5
2.71.2
31 (x Is)
x10
x1
VAP6 test plug
EIVISI
offRI
DT
DT only
curve selection
t>
warning
not timemultiplier
see table
warning
not timemultiplier
see table
VIP 300Settings
Equivalent TimeMultiplier
t>
0.050.070.10.150.20.30.40.050.60.070.10.150.20.30.40.6
to>
x1x1x1x1x1x1x1
x10x1
x10x10x10x10x10x10x10
SI
0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02
VI
0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00
EI
0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43
Current (multiples of Ios)
Current (multiples of Is)
15
[( ) ]
VIP 300 protection relayApplication - transformers
VIP 300
0.40.20.60.1
0.90.05
1.50.03
to>>(s)
129156
204
off3 (x Is)
0.20.150.30.1
0.40.07
0.60.05
0.40.20.60.1
0.90.05
1.50.03
t>>(s)
129156
204
off3 (x Ios)
2.11.82.41.5
2.71.2
31 (s)
0.20.150.30.1
0.40.07
0.60.05
to>(s)
curve selection
DT onlyIo> Io>>
I>>
Is
9684 11272 128
60 14448 160
40 180200(A)
Ios
4832 6424 40
16 1008 120
4 140160(A)
t>
I>
trip
reset
trip
Io>
earth fault
x10
sensors:200/1 4509996A0VIP300LH range: x4
minimum operatingphase current: 20A
phaseovercurrent
x1
EIVISI
offRI
DT
curve selection
2.11.82.41.5
2.71.2
31 (x Is)
x10
x1
VAP6 test plug
EIVISI
offRI
DT
DT onlyI>
warning
not timemultiplier
see table
warning
not timemultiplier
see table
VIP 300Settings
Equivalent TimeMultiplier
t>
0.050.070.1
0.150.20.30.4
0.050.6
0.070.1
0.150.20.30.40.6
to>
x1x1x1x1x1x1x1
x10x1
x10x10x10x10x10x10x10
SI
0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02
VI
0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00
EI
0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43
Example 2
Principles as example 1
A CE2 circuit breaker feeds a typical MV/LV 11kV 2MVA transformer. Transformer impedanceand fault level as in example 1.
The rated current for a 2MVA transformer.
Ir = power = 2000 x 103= 105A
voltage x �3 11000 x �3
Choice of range:The load current exceeds the current range for the x2 setting thus the x4 setting is appropriate.
Range chosen x4 minimum operating current = 40A
Choice of curve:For this example we are dealing with a similar MV/LV application, the curve types are asselected as follows.
I> setting EIIo> setting DT
Choice of current setting:A typical overload of 30% and earth fault level of 40% are considered as inexample 1.
Is 144AIos 48A
Choice of Iow set time delay:Overcurrent t>, The LV 3 phase fault level = 1809A @ 11kV (using formula inexample 1).
t = 80 x t> If 2
-1 0.808 Is
t> = 1809 2 -1 x 0.35 x 0.808 = 0.55
144 80
The earth fault element is set as before
t> 0.6 x1to> 0.1 x1
Choice of high set current:As before
I>> 15Io>> off (disabled)
Choice of high set time delay:As before
t>> 0.03to>> 0.03 (not used as high set
current in off position).
[( ) ]
16
VIP 300 protection relayApplication - feeders
Example 3
A CE6 unit protects an 11kV radial feed feeding 4 RN2c units each subsequently feeding1000kVA transformers. The CE6 is an extensible 630A circuit breaker complete with 800/1ACTs.
Effective load current.Ir = power = 4000 x 103 = 210A voltage x �3 11000 x �3
The HV three phase fault level is assumed as 250MVA. The earth fault level is assumed as100 MVA. The corresponding fault current can be calculated from:
I3ph = MVAs = 250 x 106 = 13121A voltage x �3 11000 x �3
I1ph = MVAEF = 100 x 106 = 5248A
voltage x �3 11000 x �3
Choice of range:
min. operating current = 80A x2 range overcurrent 80A - 400A earth fault 8A - 320Amin. operating current = 160A x4 range overcurrent 160A - 800A earth fault 8A - 640A
By selecting the minimum operating current of 80A (x2 range) then the feeder rated current isin the midpoint of the range.
Range chosen x2 minimum operating current = 80A
Choice of curve:
This example deals with feeder protection, SI or VI curves are suitable as they have sloweroperating times for high fault levels. It depends on the device upstream and downstream andthe discrimination to be achieved at the HV fault level.
I> SIIo> SI
Choice of current setting:
Overcurrent protection should take into account the max load current, 210A, and possibleoverload of one or more of the transformers. Earth fault protection assumes a 40% earth fault.
Is 256AIos 96A
Choice of low set time delay setting:
Overcurrent:Consider example 1 as downstream device with t> setting equal to 0.5, a t> setting of 1.5 forthe upstream device gives adequate margin over the entire characteristic t> 0.15 x 10.
17
[( ) ]
[( ) ]
1.2 x Is
100
1000
10
1
0.1
0.011 10 100
10 x Is
t>
VIP 300 protection relayApplication - feeders
For the earth fault element the downstream device operates at 0.1s, therefore the requiredoperating time for the upstream relay is 0.5s at the maximum phase - earth fault level.
t = 0.14 x to> desired time t = 0.5 If 0.02
-1 2.97 If (fault level) = 5248A Is Is (current setting) = 96A
to> = ?To find to> rearrange formula
to> = If 0.02 -1 x t x 2.97 Is 0.14
to> = 5248 0.02 -1 x 0.5 x 2.97 96 0.14
By inserting the values into the formula to> = 0.88 select 1.0 as nearest setting.The actual operating time can now be found by placing back into the formula above.Desired operating time t = 0.57to> 0.1s x10
Choice of high set:
Disabled for this application.
I>> offIo>> off
Choice of high set time delay:
Disabled as high set is in off position set at minimum t>> & to>> = 0.03
VIP 300
0.40.20.60.1
0.90.05
1.50.03
to>>(s)
129156
204
off3 (x Is)
0.20.150.30.1
0.40.07
0.60.05
0.40.20.60.1
0.90.05
1.50.03
t>>(s)
129156
204
off3 (x Ios)
2.11.82.41.5
2.71.2
31 (s)
0.20.150.30.1
0.40.07
0.60.05
to>(s)
curve selection
DT onlyIo> Io>>
I>>
Is
192168 224144 256120 288
96 32080 360400
(A)
Ios
9664 12848 160
32 20016 240
8 280320(A)
t>
I>
trip
reset
trip
Io>
earth fault
x10
sensors:800/1 4509996A0VIP300LH range: x2
minimum operatingphase current: 20A
phaseovercurrent
x1
EIVISI
offRI
DT (s)
2.11.82.41.5
2.71.2
31 (x Is)
x10
x1
VAP6 test plug
EIVISI
offRI
DT
DT onlyI>
curve selection
warning
not timemultiplier
see table
warning
not timemultiplier
see table
VIP 300Settings
Equivalent TimeMultiplier
t>0.050.070.10.150.20.30.40.050.60.070.10.150.20.30.40.6
to>x1x1x1x1x1x1x1
x10x1
x10x10x10x10x10x10x10
SI
0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02
VI
0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00
EI
0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43
Overcurrent
Earth fault
1.2 x Is
100
1000
10
1
0.1
0.011 10 100
10 x Is
t>
Current (multiples of Ios)
Current (multiples of Is)
[( ) ]
18
VIP 300 protection relayApplication - feeders
Example 4An extension is planned for the system to feed another 4 RN2c units in a ring as shown in thediagram, the CE6 ring feeders would have to be capable of feeding the load on the ring.Example carried out as example 3.
Choice of range
Load rating exceeds range x2 maximum, 420A.
Rating chosen x4 minimum operating current = 160A
Choice of curve
As example 3.
Choice of current setting
Is 512A
Iso 192A
Choice of low set time delay
calculated similarly to example 3
t> 0.15 x10to> 0.07 x10
Choice of high set
As example 3.
Choice of high set time delay
As example 3.
VIP 300
0.40.20.60.1
0.90.05
1.50.03
to>>(s)
129156
204
off3 (x Is)
0.20.150.30.1
0.40.07
0.60.05
0.40.20.60.1
0.90.05
1.50.03
t>>(s)
129156
204
off3 (x Ios)
2.11.82.41.5
2.71.2
31 (s)
0.20.150.30.1
0.40.07
0.60.05
to>(s)
curve selection
DT onlyIo> Io>>
I>>
Is
384336 448288 512240 576192 640
160 720800(A)
Ios
192128 25696 320
64 40032 480
16 560640(A)
t>
I>
trip
reset
trip
Io>
earth fault
x10
sensors:800/1 4509996A0VIP300LH range: x4
minimum operatingphase current: 20A
phaseovercurrent
x1
EIVISI
offRI
DT
curve selection(s)
2.11.82.41.5
2.71.2
31 (x Is)
x10
x1
VAP6 test plug
EIVISI
offRI
DT
DT onlyI>
warning
not timemultiplier
see table
warning
not timemultiplier
see table
VIP 300Settings
Equivalent TimeMultiplier
t>
0.050.070.1
0.150.20.30.4
0.050.6
0.070.1
0.150.20.30.40.6
to>
x1x1x1x1x1x1x1
x10x1
x10x10x10x10x10x10x10
SI
0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02
VI
0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00
EI
0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43
19
Phase overcurrent AccuracyI> Low set - three phase �5% or 0/+2A
- single phase �10% or 0/+4At> Low set time delay
- definite time � 2% or � 20ms *(see note)- IDMT class 5 according to IEC 255-3 *(see note)
I>> High set �5%
t>> High set time delay �2% or �20ms *(see note)% of pick-up 95%storage time 20ms
*Operating times refer to when the relay is powered up, the tripping times indicated do not include the Mitop response time.When the relay is switched onto a fault the operating time will be extended by:+30ms at 1.5ls+20ms from 2ls to 10ls+10ms above 10ls
Earth fault AccuracyIo> Low set - three phase �5% or 0/+2A
- single phase �10% or 0/+4A
to> Low set time delay - Definite time �2% or �20ms *(see note)- IDMT class 5 according to IEC 255-3 *(see note)
Io>> High set �5%
to>> High set time delay �2% or �20ms *(see note)% of pick up 95%storage time 20ms
*Operating times refer to when the relay is powered up, the tripping times indicated do not include the Mitop response time.When the relay is switched onto a fault the operating time will be extended by:+30ms at 1.5ls+20ms from 2ls to 10ls+10ms above 10ls
General characteristics ValueOperating frequency 50Hz +10%, 60Hz +10%Operating temperature -25�C to +70�CStorage temperature -40�C to +85�CContinuous rating 240A With Ringmaster 200/1A CTContinuous rating 960A With Ringmaster 800/1A CT
Environment & Standard Severityelectromagnetic capabilityVibration IEC 255-21-1 Class 2Enclosure protection index EN 60529 IP54(cover closed) IP20(cover open)Sensor input isolation IEC 255-5 2kV rms, 50 Hz, 1mn1.2/50 �s impuse voltage IEC 255-5 5kV1MHz dampened oscillating wave IEC 255-22-1 2.5kV cm
1kV dmRapid transient bursts IEC 255-22-4 4kV cm and dm, 5kHz burst1.2/50 (8-20�s) hybrid wave IEC 1000-4-5 2kV 42 ohmsElectrostatic discharge IEC 255-22-2 8kV in air 6kV on contactRadio frequency on I/Os EN 50082-2 10V,0.15 to 80 MHzHF electromagnetic field IEC 255-22-3 30V/m not modulated, 27 to 1000 MHz
EN 50082-2 10V/m mod. ampl., 80 to 1000MHzEN 50082-3 11V/m mod. impuls., 900MHz
50/60 Hz magnetic field EN 50082-2 30A/m steadyIEC 1000-4-8 300A/m, 1s
Radiant field emitted EN 50081 30 dB�V/m at 10m, 30 to 230MHz37 dB�V/m at 10m, 230 to 1000MHz
VIP 300 protection relayTechnical characteristics
20
■ The graphs in this section represent the 8 time delay settings for t> and to>available on the x1 and x10 ranges.
■ The low set pick-up settings I> and Io> are fixed at 1.2xIs and 1.2xIsorespectively for the IDMT characteristics.>
■ The numbers given on the right of the curves represent the position of the timedelay selector switch t> or to>. They correspond to the actual operating timeat a current of 10 times the pick-up.
■ If the multiplying factor x1/x10 is in the x10 position, multiply the time delayselector settings by 10 (see x10 graph).
■ The phase overcurrent and earth fault protection curves are the same.
IDMT tripping curves
VIP 300 protection relayIDMT tripping curves
Standard inverse
t = 0.14 x t> I 0.02
-1 2.97
Is ( )
SI current/time curves with selectorswitch on the x1 setting
SI current/time curves with selectorswitch on the x10 setting
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21
VIP 300 protection relayIDMT tripping curves
RI curve(Specific application - please consult Merlin Gerin)
VI current/time curves with selectorswitch on the x1 setting
VI current/time curves with selectorswitch on the x10 setting
Very inverse
t = 13.5 x t> I
-1 1.5
Is( )
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22
VIP 300 protection relayIDMT tripping curves
Extremely inverse
t = 80 x t> I 2
-1 0.808
Is( )
EI current/time curves with selectorswitch on the x1 setting
EI current/time curves with selectorswitch on the x10 setting
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23
■ The graphs below represent the 8 low set pick-up settingsfor I> and Io> and the 8 time delay settings for t> and to> available on the x1and x10 ranges.
■ The low set pick up settings I> and Io> are variable between 1 and 3 times Isand Ios respectively.
■ The numbers given at the top of the curves represent the variable setting ofthe low set selector switch I> and Io>. The numbers given on the right of thecurves represent the position of the time delay sector switch t> or to>.
■ If the multiplying factor x1/x10 is in the x10 position, multiply the time delayselector settings by 10 (see x10 graph).
■ The phase overcurrent and earth fault protection curves are the same.
DT tripping curves
VIP 300 protection relayDT tripping curves
DT current/time curves with selectorswitch on the x1 setting
DT current/time curves with selectorswitch on the x10 setting
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JAN 2004MGMV 5477Merlin Gerin Medium Voltage 123 Jack Lane, Hunslet, Leeds LS10 1BS UK
Tel: +44 (0)113 290 3500 Fax: +44 (0)113 290 3710 www.schneider.co.uk
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