The shell of the distribution box (cabinet) is made of cold-rolled steel plate, which is rain proof, dust-proof and outdoor.
The connection between PE line and terminal board must be electrically connected.
The products shall pass CCC certification.
Schematic diagram of power switch box below 40A terminal contact and electrical contact connection diagram of power switch box below 40A electrical system diagram of power switch box for equipment below 40A.
The control switch is DZ20 (Se or kdm1) series transparent molded case circuit breaker, and the leakage circuit breaker is DZ15L series transparent series leakage circuit breaker; There are 3 PE line connecting bolts..
At the same time, it is equipped with watt hour meter, voltmeter, ammeter Two sets of current mutual storage devices.
One is the connection point of PE line into the box, and the other is the connection point of repeated grounding.
The product of rated leakage action current and rated leakage action time of leakage protection device shall not be greater than 30mA.
The n-wire terminal board must be insulated from the metal electrical installation board; The PE line terminal board must be electrically connected with the metal electrical installation board.
Source: if there is any infringement in Zhulong forum, please contact to delete this series of distribution boxes (cabinets) which are applicable to the construction site and outdoor temporary power consumption and shall meet the use requirements of “three-level power distribution, two-level leakage protection, one machine, one switch, one leakage and one box”.
It is better to select the rated leakage action current of 75-150ma, the rated leakage action time is greater than 0.1s and less than or equal to 0.2S, and the action time is delay action type.
1 basic requirements (I) the production and manufacture of distribution box (cabinet) shall comply with the special requirements of low voltage switchgear and control equipment Part IV gb7251.4 for complete sets of equipment (ACS) for construction site and the standard requirements of technical code for safety of temporary power use on construction site (JGJ46-2005).
（3） The distribution box (cabinet) and switch box shall be provided with n-line and PE line terminal boards, and the incoming and outgoing lines must be reliably connected through the terminal boards.
S.
The main distribution box (cabinet) is equipped with 400a-630a DZ20 transparent molded case circuit breaker with isolation function as the main switch, and 4-8 circuits of DZ20 series 160a-250a transparent molded case circuit breaker with isolation function are set in the branch, and dz20l (DZ15L) transparent leakage switch or lbm-1 series are configured as the leakage protection device, so that it has the functions of undervoltage, overload, short circuit, leakage and phase failure protection.
The thickness of the steel plate complies with jgj-2005 standard and is durable.
General distribution cabinet schematic diagram general distribution cabinet terminal board contact diagram general distribution cabinet door electrical connection point diagram four circuit distribution cabinet electrical system diagram six circuit distribution cabinet electrical system diagram eight circuit distribution cabinet electrical system diagram 3 distribution box (I) including lighting circuit distribution box (power circuit and lighting circuit shunt distribution) is equipped with 200a-250a DZ20 series transparent molded case circuit breaker with isolation function as the main switch (adapted to the circuit breaker set in the branch of the general distribution box); DZ20 or KDM-1 transparent molded case circuit breaker is used as the control switch for power shunt and lighting shunt; DZ20 or KDM-1 transparent molded case circuit breaker is used as the control switch for each power distribution circuit; PE line connecting bolts and N line connecting bolts shall be configured according to actual needs.
Schematic diagram of distribution box electrical connection diagram of distribution box electrical system diagram of distribution box including tower crane circuit (the diagram of terminal board contact and electrical connection point is the same as above) schematic diagram of distribution box including tower crane circuit (II) schematic diagram of distribution box excluding lighting circuit 6-8 circuit distribution box 6 circuit distribution box including tower crane circuit (the diagram of terminal board contact and electrical connection point is the same as above) 8 circuit distribution box system diagram 6 circuit distribution box system diagram including tower crane circuit 4 switch box (set according to one machine, one switch and one leakage box) (I) kdm1 or DZ20 (380V above 160A) series transparent plastic case circuit breakers are set as control switches in the power switch boxes of large equipment such as ground pumps, and dz20l series transparent leakage circuit breakers or lbm-1 series leakage circuit breakers are set; The PE line terminal block is composed of 3 connecting bolts.
2.
The number of electrical connection points should be 2 more than the number of circuits in the box.
（4） Electrical components shall be products conforming to the standards of GB / 14048.2-2001, gb6829 and JGJ46-2005, and shall meet the technical requirements for promotion and application of the Ministry of construction during the 11th five year plan.
The n-line in the incoming and outgoing lines must be connected through the n-line terminal board; The PE line must be connected through the PE line terminal board.
The material selection, manufacturing process, selection and configuration of electrical components in the distribution box (cabinet) and switch box shall comply with relevant national standards and the regulations of the Ministry of construction on promotion and application technology during the 11th five year plan.
（2） The installation and use of distribution box (cabinet) and switch box shall comply with the technical code for safety of temporary electricity use on construction site (JGJ46-2005) and the standardization requirements of safety guidelines for electricity use (GB / t13869).
Schematic diagram of switch box of ground pump and other large equipment electrical system diagram of ground pump and other large equipment (II) the power switch box of tower crane and other equipment is set, and the configuration is the same as that of the power switch box of tower crane and other equipment schematic diagram of power switch box of tower crane and other equipment (III) DZ20 (20-40a, 380V) or se is set in the switch box of electric equipment below 3.0kw, and kdmi series transparent molded case circuit breaker is used as the control switch, Dz15le (20-40a) or lbm1 series transparent leakage circuit breaker shall be provided, and the PE line terminal block shall be provided with 4 connecting bolts.
