Siemens 7PJ12 Master Trip Relay
Siemens 7PJ12 Master Trip Relay is an electro-mechanical relay that operates on the attracted armature principle, designed to IEC60255.
Auxiliary relay is available in 3 NO contacts and 2 CO contacts with self-reset contacts type with or without a flag.
Trip relay low burden is available in 3 NO and 3 NC contacts. Trip relay with a high burden is available in 3 NO and 2 NC contacts with hand reset contacts type.
Auxiliary Relay and Trip Relay is used in high speed operation which suits the requirements like transmission and industrial applications.
Features
- Suitable for signalling in protection and control systems where immunity to capacitance discharge is required
- Robust design for a long, reliable, service life
- Heavy-duty contact ratings
- High voltage insulation
- Lower-rated burden
- Higher operational stability
- Flag indication for the operated conditions
- Individual variant for Auxiliary voltages DC 110 V, DC 220 V
Applications of Siemens 7PJ12 Master Trip Relay
Auxiliary Relay and Trip Relay
- The design, durability, and superior quality of these relays ensure reliable performance. As a result, they are extensively deployed in high-responsibility control systems, particularly in power stations, substations, and process industries.
- Applications are for general contact multiplication, interlocking, and customising of protection schemes
- To use in relay coordination and to provide control commands or signal commands to other devices in use
- To provide durability and quality of response
Technical Data for Auxiliary Relay |
|
| Rated voltage (Un) | DC 110 V, DC 220 V |
| Operating range | 70% to 115% |
| Pickup voltage (%Un) | 65% of rated value Un |
| Drop-off voltage (%Un) | Not less than 20% Un |
| Pickup time at Un (typical) | < 20 ms |
| Maximum power consumption | For Un DC 110 V, 16 W
For Un DC 220 V, 16 W |
| Flag | Either Hand Reset (HR) or No flag |
| Contacts | Self Reset |
| Reset time* | < 20 ms |
| Mechanical life | 10,000 operations |
| Switching rate | 500 operations per hour at full breaking current
(Rated breaking current 5 A with full resistive load) |
| Thermal withstand | Continuous = 1.15 Un
For 10 s = 1.30 Un |
| No of contacts | 3 NO + 2 CO |
Technical Data for Trip Relay |
||
| Rated voltage (Un) | DC 110 V, DC 220 V | |
| Operating range | 70% to 115% | |
| Pickup voltage (%Un) | 60% of rated value Un | |
| Pickup time at Un (typical) | ≤10 ms | |
| Maximum power consumption | Low Burden
For UN DC 110 V, 80 W For UN DC 220 V, 80 W |
High Burden
For UN DC 110 V, <150 W For UN DC 220 V, <150 W |
| Flag | HR – Hand Reset | |
| Contacts | Hand Reset | |
| Reset time* | < 20 ms | |
| Mechanical life | 10,000 operations | |
| Switching rate | 360 operations per hour at full breaking current
(Rated breaking current 5 A with full resistive load) |
|
| Thermal withstand | Continuous = 1.15 Un
For 10 s = 1.30 Un |
|
| No of contacts | Low Burden
3 NO + 3 NC |
High Burden
3 NO + 2 NC |
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