19
7.2 Inspection before operation
Before the transformer is put into operation, it is recommended that the following steps shall be followed to ensure
that the transformer is under good operating conditions:
7.2.1 Remove transport aids such as plastic sheeting, wood cubes, tightening belts, etc. from the transformer prior to
operation.
7.2.2 Check the appearance of transformer high-voltage winding, low-voltage winding, iron core, etc.
7.2.3 Check the appearance and function of transformer accessories such as temperature controller, fan and
electromagnetic lock (refer to 7.1).
7.2.4 Check torque of electrical connection point such as transformer outlet terminal and tapping (refer to 6.5.3).
7.2.5 Check the distance between the live part of the transformer and its surroundings to meet the minimum electrical
safety clearance requirement (refer to 6.6).
7.2.6 Clean the transformer to ensure that no foreign matter remains in the transformer (see 9.1).
7.1.3 Electromagnetic lock
The electromagnetic lock (as shown below) is installed on the protective enclosure of the transformer (if electromagnetic
lock is required in the contract) to realize the joint defense requirements of the equipment. Electromagnetic locks with
different functions can be selected according to user requirements. Refer to the following commissioning steps:
a. Check the mechanical structure, terminal of electromagnetic lock.
b. Understand the functional characteristics of the electromagnetic lock, according to the operation manual of the
electromagnetic lock.
c. In the power-on and power-off states, verify whether the unlocking and locking functions of the electromagnetic
lock meet.
7. Commissioning
Schematic diagram of electromagnetic lock
1. Lock body
2. Indicator lamp
3. Handle
4. Lock bolt
5. Panel
6. Mounting nut
7. Power cord
8. Power cord
connector
9. Unlock keyhole
Unlock key