Siemens 7PJ12 Master Trip Relay

Siemens 7PJ12 Master 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

• 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 of Siemens 7PJ12 Master Trip Relay

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