Selection Guide

Unless otherwise specified, all load currents indicated on the Hangwang relay case are for resistive loads. Under the rated switching voltage, the allowable current of inductive loads should not exceed 30% of the rated resistive loads, the allowable current of motor loads should not exceed 20% of the rated resistive loads, the allowable current of lamp loads should not exceed 10% of the rated resistive loads, and the allowable current of capacitive loads should not exceed 5% of the rated resistive loads. In order to ensure the reliability of the product, it is recommended that the contact load current value should not exceed 60% – 70% of the steady state current value under the rated load of the product.

Nature of the load	Inrush current
Resistive load	1 times the steady-state current
Sodium lamp load	1-3 times the steady-state current
Mercury-vapor lamp load	3 times the steady state current
Inductive load	3-5 times the steady-state current
Motor load	3-5 times the steady-state current
Voltage load	3-5 times the steady-state current
Incandescent lamp load	3-5 times the steady-state current
Capacitive load	3-5 times the steady-state current

Description Of Contact Forms

Name	Domestic code	International code	Structural form
Conversion type	Z	C
Normally open	H	A
Normally closed	D	B

Switching type:

The center is a moving contact, coil is not energized, the moving contact and one of the static contact is disconnected and the other one is closed, after the coil is energized, the moving contact will move, so that the original disconnected into a closed state, the original closed into a disconnected state, to achieve the purpose of conversion.

Normally open type:

The contacts are open when the coil is not energized and closed when energized.

Normally closed type:

The contacts are closed when the coil is not energized, and the contacts are closed when energized.