12
YT-700 series
4.5 Connection – Power
4.5.1 Safety
When installing in hazardous and explosive gas area, conduit tube or pressure-proof
packing union must be used. The compound charging
box should be the flameproof type and must be sealed
completely.
Conduit entry connection tap is PF 1/2 or G 1/2.
Before connecting terminal, ensure that the power is off
completely.
Do not open the cover when the power is
still alive.
Please use twisted cable with conductor section are
1.25mm
2
and that is suitable for 600V (complying to the
conductor table of NEC Article 310.) The outer diameter
of the cable should be between 6.35 ~ 10mm. Use shield
wire to protect against electro-magnetic field and noise.
Please do not install the cable near high noise equipment -
such as high-capacity transformer or motor.
5 Maintenance
Two parts can be replaced – coil assembly and valve. Parts can be replaced easily at the field;
however, when performing maintenance in hazardous and explosive gas area, please follow
safety
precautions.
For YT-700 series, only
coil assembly can be
changed.