Time Delay OFF Relay – for MEP 004A / 005A / 006A / 103A / 104A / 105A or any other use where a 24 VDC Time Delay Off Relay is needed. This Relay Kit disconnects the self holding Contact CB AUX of the CB 1 Contactor during Automatic Operationes when the Generator enters the cool down phase.
This Relay Kit is needed to disable the Self Holding Contact CB AUX of the CB 1 Contactor. This is an optional Kit and should be purchased if you need to have Contactor K1 turn off during the cool down phase.
This Relay is a more economically priced solution for a Standard Timed Relay and is mechanically more rugged.
This Relay K ext. Kit can also be used if it becomes necessary to delay a switching function between two Relays or contactors.
D1: 3 Amp General Purpose Diode
D2: 3 Amp General Purpose Diode
Cx: Electrolytic Capacitor ( Values see table below )
K ext.: Industrial Grade Relay 24 VDC Panel Mount – DIN RAIL MOUNT is not available for this Relay
|Cx Capacitor Value||DC 24 Volt (Normal Battery Voltage)||DC 27 Volt (Alternator Voltage)|
|4,700 uF / 50V (standard)||4.0 sec||6.5 sec|
|6,800 uF / 50V (upon request)||6.0 sec||9.0 sec|
|10,000 uF / 50V (upon request)||8.0 sec||12 sec|
|15,000 uF / 50V (upon request)||12 sec||18 sec|
|The Capacitor Cx will keep the Relay K ext. energized for the amount of time specified in the table above after Terminal 1 has been turned off. Diode D1 prevents a back feeding from the capacitor into the circuit connected to Terminal 1.
This circuit will only work properly with a 0V / GND supply on Terminal 7!