What is the correct wiring method, vacuum pump unit

newly purchased vacuum pump unit has only lead to cable before use. When installation, the need to connect the cable. However, connecting cable must pay attention to the correct way, otherwise will produce a great impact on the use of vacuum pump unit. Is good for everybody, let's explain vacuum pump unit wiring method to be all things to all people:

during vacuum pump unit wiring, must pay attention to, wrapped with polyester insulating tape, the first half of a circle, must be kept by 8 to 12 floor, wrapped with plastic tape again after two layer, in order to improve strength. About connecting to the vacuum pump unit, should be stripped off the copper core of the cable length of about 30 - 35mm。 It is better to emery cloth wipe the copper wire and polished. Also must be external copper strip away 30 - three core cable 35 mm, then wipe clean with emery cloth.

three core cable with vacuum pump unit wiring off from the outside cable wire pairs, and then its fine copper wire and tied together, as shown. The rest are cut out with scissors to prevent binding. In this connection, vacuum pump three solder end should be used for welding. Welding head welding surface should be smooth without burr and errors. If there is no welding or uneven, should to welding vacuum pump, until meet the requirements.

for vacuum pump unit connection, you must use the plastic bags will be three intertwined with line. Two layers must be package. At the end of the first layer of each wire insulation should be greater than 50 mm, the second should be from the end of the first layer of insulating layer is greater than 50 mm. A pot of cold water will be the thrum of the parcel safely into the water. 12 hours later, a 500 v megohmmeter is used to measure the insulation must not be less than 50 trillion, otherwise should be repackaged, until meet the requirements.

grounding line of vacuum pump unit also should be carried out according to the requirement of the submarine cable wiring process binding. After connect the vacuum pump unit, at the same time in the decline of well should be constantly shake, insulation resistance to observe its change, in order to prevent the cable insulation casing damage. When it fell to zero. Under five megohm must adjust like unit to detect the reason.