The secondary operator is the control circuit operator. Distribution cabinet is divided into a primary operator and secondary operator, the primary part is generally called the primary operator, the secondary part is generally called the secondary operator.
The main work of the secondary operator is to reach the line that controls the primary power supply through relays, mechanical equipment, temperature control, limit and other protective devices.
Expanded Information:
Distribution Cabinet Secondary Wiring Instructions:
One, in accordance with the schematic diagram to come up, not in the same position on the terminal, do not! A terminal connected to 3 wires. Check the wrong is not so check, only in accordance with the schematic diagram to one by one right.
1, the selection of wire cross-section
The utility (AC 220V) voltage circuit line with 1.5 square millimeters; current circuit with 2.5 square millimeters. Batteries generally use 1.5 square millimeters can be.
2, wiring time, to check whether the signal at both ends of the wire corresponds, so as not to cause unnecessary errors.
3, the main thing is to understand the schematic diagram and wiring diagram.
Second, if a novice to review the map, organize a line of thought, but also to check the drawings have no problem, do not understand the place can first understand, so that it is conducive to do line. Then start wiring. The entire wiring process requires care, of course, if you are a veteran, there is no need to say so much.
Construction workers should carefully read and familiarize themselves with the secondary line symbols, to check the secondary wiring diagram with the schematic diagram to ensure that the wiring diagram is correct.
The requirements of the secondary wiring construction: construction according to the map, wiring is correct; wires and electrical components using bolts, plug, welding or crimping, etc., should be firm and reliable, wiring is good; wiring neat, clear, beautiful; wire insulation is good, no damage; cabinet wire should not have joints; circuit numbering is correct, the handwriting is clear.
Cable core cross-section selection should also meet the following requirements:
(1) current loop: the current transformer should be made to work accurately level, at this time, if there is no reliable basis for determining the maximum short-circuit current can be determined by the current capacity of the circuit breaker.
(2) voltage circuit: when all the protective devices and safety automation device action (taking into account the development, the voltage transformer when the maximum load), the voltage transformer to the protection and automation device screen cable voltage drop should not exceed 3% of the rated voltage.
(3) operating circuit: under maximum load, the voltage drop from the operating bus to the equipment should not exceed 10% of the rated voltage.