Preparations Prior To Electrical Connections - XINDA WYJ140 Series Operating Manual

be waterproof because if the machine is soaked in water, it may cause destructive
damage.
● The feet of the traction machine should be fixed with the M16 bolt of 12.9 grade
intensity (feet installation). The spanner tightening torque is 320N.m

4.2 Preparations prior to electrical connections

● The electrical connection should be connected by qualified electrician after the
machine is installed.
● Switch off all circuits (including attached or auxiliary ones) before conducting any
connection operations, especially before opening the connection box.
● Before putting into operation, insulation resistance of the motor and brake magnet
should be tested with 500V megohm meter. It's value should be bigger than 0.5MΩ. If
the value is lower than 0.5MΩ, the coil should be heated and dried. Working
frequency power can be used to heat it and its voltage value should be 5% lower than
the rated voltage value of the motor and 30% lower than the rated voltage of the brake.
Observe the heating state momentarily. The outside case surface temperature should
not exceed 80℃
●
The permanent electric connection should ensure reliable connection no looseness.
●
No external materials, dust and humidity air will be allowed to enter into the
connection box. Therefore, strict inspection should be done before connections and
locked the cable connector after connections to seal the cable entrance after the
cable enter into the connection box
Operate strictly subject to the following safe rules to avoid personal injury or
machinery damage.
● Switch off power source.
● Any devices that can activate the machine by causal touches should be closed or
locked.
● Make sure that the power source has been separated with safe devices.
● The circuit that can bring high voltage (higher than 1000V) should adopt dependable
grounding or short circuit.
●
Neighboring operating components should take safe devices or protective cover.
●
The cable connector for the machine is waterproof and in accordance with
requirements of EMC.
●
Max. allowable voltage ascending rate for terminals which are in the terminal box is
1.3kV/μs, and max. voltage is 1.3KV. If above-mentioned values are possibly
exceeded, a filter should be installed or an external reactor should be connected in
series. The filter or reactor will substantially increase the insulation life of the motor,
but also will reduce the max. rotating torque of the motor by 3~5%
● The insulating criterion for the motor is 700V, which is also the maximum DC bus bar
voltage that the 400V frequency converter can reach instantaneously