Siemens 7PJ12 Master Trip Relay
Description
Siemens 7PJ12 Master Trip Relay
7PJ12 Master Trip Relay: Auxiliary relay and Trip Relay is an electro-mechanical relay that operates on attracted armature principal designed to IEC60255.
Auxiliary relay is available in 3 NO contacts and 2 CO contacts with self reset contacts type with or without flag.
Trip relay low burden is available in 3 NO and 3 NC contacts. Trip relay 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 of 7PJ12 Master Trip Relay
- 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 contacts ratings
- High voltage insulation
- Lower rated burden
- Higher operation stability
- Flag indication for the operated conditions
- Individual variant for Auxiliary voltages DC 110 V, DC 220 V
Applications
Auxiliary Relay and Trip Relay
- The design, durability, and quality of these relays guarantee their application in high responsibility controls such as 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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