logica_in-out_15-40
DESCRIPTION
upsTRANSCRIPT
1. SWITCH ON- Input block
1. Switch On the input breaker (A) 5. Switch On SCRs of phases R, S and T (B) 2. Check Input Mains (2) 6. Switch On rectifier (F) 3. Precharge; phase R SCRs partialization (B) 7. Switch On Battery Chargers, after about
60seconds (H-I) 4. Chek Rectifier Voltage at the end of precharge (6-
7)
B 2
7
6
A
F
H
I
MASK CONTROL
2.5V
Tolerance minus
AC signal
Max input valueTolerance plus
Mask
Mask Offset
T Disable time at zero crossing 0
Input_Mask_Min_Level Input_Mask_Max_Level
• Setting parameters in ASSIST:
Point_Out_Of_Msk • Max diference of input rectifier phase current: 65%
-load>12,5% nom -Switch-off rectifier after 100ms
Vin/Vout
Mask
Max Voltage
Max Voltage
2. SWITCH ON- Output block
1. Check rectifier Voltage (6-7) 2. Switch On Inverter (L) 3. Check Inverter Voltage (9) 4. Switch On Contactor (M) 5. Check Output Voltage (11)
L 6
7
9
11
M
3. MAINS FAULT
1. Check Mains Voltage (2) 6. Switch On Rectifier (F), with changing of working method,from Rectifier to Boost
2. Switch Off Input SCRs (B) and Rectifier 7. Switch Off Battery Charger (H-I) 3. Check Battery Voltage (6-3 and 7-4) 8. Wait of 23ms 4. Wait of 2ms 9. Switch On 4th Leg (G) 5. Switch On battery SCRs (C and/or D) depending if
Battery Voltage is OK. 10. Force battery operation for at least 10sec.
2
C
4
3
B
D
F G
I
H
4. BATTERY OPERATION; Negative battery block fault
1. Check Battery Voltage (6-3 and 7-4) 2. Switch Off negative battery SCRs (D) 3. Switch Off Rectifier (F) 4. Wait of 2ms 5. Switch On Rectifier (F), with changing of working
method (F).
7
6
4
3
F
D
C
5. BATTERY TO MAINS COMMUTATION
1. Check Mains Voltage (2) 7. Switch Off 4th Leg (G) 2. Switch Off Battery SCRs (C-D) 8. Wait 22ms 3. Switch OFF Rectifier (F) 9. Switch On Battery Charger (H-I) 4. Wait 2ms 5. Switch On input SCRs 6. Switch On Rectifier (F), with changing of working
method (F), from Boost to Rectifier
2
B C
D
F G
I
H
6. INVERTER TO AUX. MAINS COMMUTATION (Inrush current)
1. Check Output Voltage (11) 7. Forcing By-Pass state for 2sec (O) 2. Switch Off Inverter (L) 3. Check Auxiliary Mains (1) 4. Switch On By-Pass SCRs (O) 5. Wait 100ms 6. Switch Off Contactor
1
L
11
O M
7. AUXILIARY MAINS TO INVERTER COMMUTATION
1. Switch On Inverter (L) 7. Switch Off Auxiliary Mains SCRs(O) 2. Wait 7 ms, than Check Inverter Voltage (9) 8. Default Inverter Voltage (L) 3. Variation of Inverter Voltage Vinv=Vmains+10V
(L)
4. Check syncronism Inverter/Mains 5. Wait 1 sec, than Switch On contactor ((M) 6. Overlap Mains/Inverter of XX ms
9
L O M
AUXILIARY MAINS TO INVERTER COMMUTATION
0 +22ms +25ms-20ms
Typique12ms
15ms10ms
Cde K1
Fermeture de K1(puissance)
Cde thyristorsby-pass
Cde Elévationtension onduleur
0
0
0
Mains following CMD
Contactor CMD
Contactor closing
By-Pass CMD
Mask Enable
+20ms +32ms -1s
0
0
8. ECO-MODE: Auxiliary Mains fault
1. Check Output Voltage (11) 2. Switch OFF Auxiliary Mains SCRs (O) 3. Switch On Inverter (L) 4. Wait 7 ms, than Check Inverter Voltage (9) 5. Switch On contactor ((M)
9
L O M
11
9. NORMAL MODE TO ECO MODE COMMUTATION
1. On Mimic Panel, set “Eco-Mode” command (Operator)
2. Check Aux. Mains Voltage (1) 3. Switch Off Inverter (L) 4. Switch On Aux. Mains SCRs (O) 5. Wait 100ms 6. Switch Off Inverter Contactor
1 MO L
10. MANUAL BY-PASS
1. On Mimic Panel, set “Eco-Mode” command (Operator)
5. Wait 100ms
2. Check Aux. Mains Voltage (1) 6. Switch Off Inverter Contactor (M) 3. Switch Off Inverter (L) 7. Move the Output Breaker (N) in position “2”
(operator); in any case, the micro-switch of Output Breaker (N) force the Inverter to Mains commutation.
4. Switch On Aux. Mains SCRs (O)
O 1
L M
N
11. TRIES In case of fault or very critical external conditions, the UPS change logic to stop the appropriate power block. Sometimes is allowed to UPS to do some tries to restart; the main cases are:
PROBLEM N° OF TRIES Precharge failure 3 Max Vboost 3 Min Vboost 3 Inverter to Aux. Mains commutation 5 Inverter Starting failure 3
12. INVERTER AND RECTIFIER FREQUENCY
• Inverter and Rectifier don’t run with fix PWM frequency. This fact permit to UPS to work in very strong and critical conditions, presents in same moment, keeping reduced the losses of IGBT and its juntion temperature. With low load the PWM increase reducing noise. • PWM frequency is always the same both for Inverter and Rectifier, even if the threshold of commutations are different. The worse case (Inverter or Rectifier) force the lower frequency. • PWM frequency depends by: -Inverter/Rectifier Current -Heat sink temperature -Rectifier operation: Mains voltage value, one or two battery blocks. • PWM frequency: -15kHz -12,5kHz -10kHz -8kHz • In nominal condition of input mains, at 35°C, the link between load and frequency is the following (exept for 40kVA):
PWM frequency % Load R % Load RCD 15kHz 0÷70 0÷60
12,5kHz 70÷120 60÷100 10kHz 120÷150 100÷125 8kHz >150 >125
Histeresys:10%
