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Amperes Frame (based on IEC, BS or IS) TYPE (number of poles 3 | 630 VMH-6D |
800 VMH-8D |
1000 VMH-10D |
1250 VMH-12D |
1600 VMH-16D |
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* Rated Ultimate Breaking Capacity/Rated Making Capacity (Icu, RMS/Icm, Peak) kA 415 AC | 50/105 | 50/105 | 55/121 | 55/121 | 55/121 | |
* Rated Service Breaking Capacity/Rated Making Capacity (Ics, RMS/Icm, Peak) kA 415V AC | 45/94.5 | 45/94.5 | 50/105 | 50/105 | 50/105 | |
250V DC | 40/40 | 40/40 | 40/40 | 40/40 | 40/40 | |
Short time current lcw kA for 1 sec. (3 sec.) RMS | 45/25 | 45/25 | 50/25 | 50/25 | 50/45 | |
Total breaking time/closing time (m.sec) | 30/40 | 30/40 | 30/40 | 30/40 | 30/40 |
Amperes Frame (based on IEC, BS or IS) TYPE (number of poles 3 | 2000 VMH-20D |
2500 VMH-25D |
3200 VMH-30D |
4000 VMH-40D |
5000 VMH-50D |
6300 VMH-60D |
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* Rated Ultimate Breaking Capacity/Rated Making Capacity (Icu, RMS/Icm, Peak) kA 415 AC | 60/132 | 65/143 | 75/166 | 100/200 | 100/200 | 120/264 | |
* Rated Service Breaking Capacity/Rated Making Capacity (Ics, RMS/Icm, Peak) kA 415V AC | 50/105 |
50/105 | 65/143 | 85/187 | 85/187 | 100/220 | |
250V DC | 40/40 | 40/40 | 40/40 | 40/40 | 40/40 | 40/40 | |
Short time current lcw kA for 1 sec. (3 sec.) RMS | 50(50) |
50(50) | 65(65) | 85(70) | 85(70) | 100(70) | |
Total breaking time/closing time (m.sec) | 30/40 | 30/40 | 30/40 | 30/40 | 30/40 | 30/40 |
uiT is a true RMS sensing overcurrent trip device, requiring no external supply for its basic function. It is available in two types, i.e., uiT 100 for industrial application and mIT–G for generator protection.
All AH Series Air Circuit Breakers are equipped with a MicroPro Control Unit that can be changed on sites. Control Units are designed to protect Power Circuits and connected loads.
Type | 4.0 | 4.1 | 5.1 |
Over Load Protection | |||
Pick up | 0.4-1.0 In with OFF in lOsteps: 0.4, 0.5, 0.6, 0.7, 0.8, 0.85, 0.9, 0.95,1, OFF | 0.4-1.0 In with OFF in lOsteps: 0.4, 0.5, 0.6, 0.7, 0.8, 0.85, 0.9, 0.95,1 ,OFF | 0.4-1.0 In with OFF in 10 steps: 0.4, 0.5, 0.6. 0.7, 0.8, 0.85,0.9,0.95,1,OFF |
Delay | 2.5 to 25 sec at 6 Ir in 10 steps: 2.5,5,7.5, 10,12.5,15, 17.5, 20, 22.5, 25 sec | 2.5 to 25 sec at 6 Ir in 10 steps: 2.5,5,7.5, 10,12.5,15, 17.5, 20, 22.5, 25 sec | 2.5 to 25 sec at 6 Ir in 10 steps: 2.5,5,7.5,10,12.5,15,17.5, 20, 22.5, 25 sec |
Short Circuit | |||
Pick up | 1.5-10 Ir in lOsteps: 1.5,2,2.5,3,4,5,6,8, 9,10 | 1.5-10 Ir in 10 steps: 1.5,2,2.5,3,4,5,6,8, 9,10 | 1.5-10 Ir in 10 steps: 1.5,2,2.5,3,4,5,6,8,9,10 |
Delay | Inst - 600 msec in 7 steps: Inst. 0.1,0.2,0.3, 0.4, 0.5, 0.6 | Inst - 600 msec in 7 steps: Inst. 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 | Inst - 600 msec in 7 steps: Inst. 0.1, 0.2, 0.3 , 0.4, 0.5, 0.6 |
Instantaneous | |||
2.0 -12 In with OFF in 10 steps: 2, 3, 4, 5, 6, 8, 9, 10,12, OFF | 2.0-12 In with OFF in 10 steps: 2, 3, 4, 5, 6, 8, 9, 10,12, OFF | 2.0-12 In with OFF in 10 steps: 2,3,4,5,6, 8,9,10,12, OFF | |
Earth Fault | |||
Pick up | Not Available | 0.2-1.0 In with OFF in10 steps: 0.2, 0.3, 0.4, 0.5, 0.6, 0.7,0.8,0.9,1.0, OFF | 0.2-1.0 In with OFF in10 steps: 0.2, 0.3, 0.4, 0.5, 0.6, 0.7,0.8,0.9,1.0, OFF |
Delay | Not Available | lnst-600 msec in 7 steps: Inst. 0.1,0.2, 0.3, 0.4, 0.5, 0.6 | Inst - 600 msec in 7 steps: Inst. 0.1, 0.2, 0.3 , 0.4, 0.5, 0.6 |
N Protection | |||
Pick up | Not Available | OFF, 50%, 100% In | OFF, 50% - 200% in 1 % steps |
Indication, Monitoring & Control | |||
Power ON LED | Available | Available | Available |
Over Load Flashing LED | Available | Available | Available |
Over Load Trip LED | Available | Available | Available |
Short Circuit Trip LED | Available | Available | Available |
Earth Fault Trip LED | Not Available | Available | Available |
LCD Dispay | Available | Available | Available |
Remote Alarm/Trip Indication | Through 7 programmable relays (optional) | Through 7 programmable relays (optional) | Through 7 programmable relays |
Trip History | Fault type, current and time for last 16 trip events | Fault type, current and time for last 16 trip events | Fault type, current and time for last 16 trip events |
Zone selectivity | Available | Available | Available |
Settings Adjustment by | Knob | Knob | LCD + panel |
Measurements | |||
Load current | Phase & N (RMS Value) | Phase & N (RMS Value) | Phase & N (RMS Value) |
Fault current | OL, SC & Inst. | OL, SC, Inst, EF&N | OL, SC, Inst, EF&N |
Communication | |||
To remote | All parameters through communication module | All parameters through communication module | All parameters through communication module |
Connectivity & protocol | To SCADA system through MODBUS | To SCADA system through MODBUS | To SCADA system through MODBUS & other popular protocols |