APPLICATION AREA
The K-17c relay is designed for installation in transformer units manufactured by SAKOP.In electric circuits it acts as a central protection against electric current leakages with the purpose to isolate networks with voltages of 133V or 230V from power supply lines.
DESIGN
The K-17 leakage interlocking and disconnecting relay is encapsulated in an enclosure with the IP- 20 index of protection and suitable for mounting on the TS-35 DIN rail. The enclosure is provided with plugged connectors to communicate with the following circuits:
· Power supply 24V AC: terminal 6-7;
· Functional contacts: relay (toggle) type: terminals 1, 2, 3
· Measuring inputs (disconnecting module):
- terminals 9, 11
· Contacts for reclosure of contacts: terminals 4, 5 (reset).
INSTALLATION
The enclosure of the relay is snap-on mounted on a standard top hat mounting rail of 35 mm size.
Terminals of the relay are to be connected to the monitored system according to the application diagram with use of LY-1.5...2.5 mm2 conductors (lug terminals must be squeezed beforehand on bare ends of connecting conductors).
COMMISSIONING
After having all connections completed in line with the application diagram please double-check correctness of the conductors routing and then supply the power voltage (terminals 6, 7). When power voltage is supplied to the device and the relay is triggered its contacts 1 and 2 must be closed whilst the contacts 2 and 3 become open. Check of the device operability can be carried out by simulation of the situation when the resistance in the measuring circuit (between contacts 9 and 11) drops below the threshold of 7 kW. Such lowering of resistance on the measuring circuit must lead to tripping of the relay. To reclose the relay it is necessary to short terminals 4 and 5.
TECHNICAL PARAMETERS
· Rated power supply voltage 24 V AC
· Input resistance for disconnection 7 kOhm ± 20%
· Rated voltage across contacts 250 V AC
· Rated continuous current of contacts 6 A
· Rated insulation voltage 250 V AC
· Dimensions (W x H x D) 45 x 75 x 105 mm
· Index of protection IP 20