SIEMENS 7PJ11 Auxiliary Relay With Self Reset Contacts

SIEMENS 7PJ11 AUXILIARY 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 SIEMENS 7PJ11 AUXILIARY 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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