G E N E R A L Descrigtion; Check Before Using - Toshiba Current Relay RC803A-HP1 Instruction Manual

Please thoroughly read this instruction manual
1. General DescriDtion
This current relay is designed to detect current in AC circuits
with a wide range of aDDiications, e.t., detection of abnoraai
current of VariOUS electrical eauiment
c i r c u i t s (e.g., heater circuits), detection of starting current to
autoaaticaiiy advance the secondary resistance on induction wound
rotor motor controllers.
During starting, excessive current such as inrush current, lay
exceed rated current flow in motor or transforaer circuits.
current relay has an adjustable delay circuit to prevent it fro&
operating during start-up.
F u r t h e r , t h i s c u r r e n t relay i s f a i l s a f e . T h e r e l a y ooerates
at the saae tile control Dower is applied. and the relay is de-
energized when the inout signal exceeds the Dreset level or control
Dower is removed.

2. Check Before Using

Before using this relay. check the following Doints. If any
defects are found, contact the dealer free which you purchased this
relay.
2 . 1 E x t e r n a l Aopearance
Check the relay for any missing Darts and for damage, dirt,
rust, and loosened screi6 caused during transportation.
before using the
due to overloads or broken
t h i s