Basic wiring of qb4 series soft starter of the hot

2022-10-12
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The basic wiring of qb4 series soft starter of electric soft starter

see the figure for the location of the main circuit and control circuit terminals of qb4 series soft starter

Figure qb4 series soft starter main circuit terminal and control circuit terminal location diagram

(I) main circuit wiring terminal wiring

1/l1, 3/l2, 5/l3 are the adhesive, which makes it easier to realize the recycling and reuse of products at the end of their service life, input terminals, and connect three-phase power supply

2/t1, 4/t2 and 6/t3 are output terminals, which are connected to three-phase motors

pe is the protective grounding terminal

qb4 soft starter has no requirements on the phase sequence of power supply and motor, and can be connected arbitrarily, which is only related to the rotation direction of motor

see the table for the description of the name of the main circuit terminal

table name and purpose of main circuit terminal

No. 135246pe name l1l2l3t1t2t3pe description A-phase input B-phase input c-phase input A-phase output B-phase output c-phase output protective ground (II) control circuit terminal wiring

11 (n/neutral line), 12 (l/phase line) external control power supply (AC220V)

13 and 14 control the soft starter to work, start when connected and stop when disconnected

15, 16 and 17 are operation auxiliary contacts, which act after starting and are used to control the bypass contactor. 15. 16 is dynamic breaking contact, 15 and 17 are dynamic making contacts, and the contact capacity is 250v/2a

18, 19 and 20 are fault auxiliary contacts, which act during fault protection. 18. 19 is dynamic breaking contact, 18 and 20 are dynamic making contacts, and the contact capacity is 250v/2a

see the table for the name and purpose of the control circuit terminal

table control circuit terminal name and purpose

number

5262

5363

name nlkrkr1kr0kf1ffk0st1st2n+n-n0 description neutral line phase line common dynamic break break break make common dynamic break make positive and negative shielding control power supply operation auxiliary output fault auxiliary output start control digital communication (optional) AC220V passive contact passive contact passive contact passive contact qb- dlttm (III) The wiring of digital communication terminals

51 ~ 53 and 61 ~ 63 are digital communication terminals. Qb-dlttm communication protocol is used to connect with the main control computer through qb-dl foundation dynamic characteristic test specification gb/t 50269 ⑼ 7ttm network adjustable report situation card

digital communication is an optional device, which will not be introduced in detail here

(IV) electrical principle diagram of qb4 series soft starter

the electrical principle of qb4 series soft starter is shown in the figure

Figure electrical schematic diagram of qb4 series soft starter

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