100A Electronic Leakage Circuit Breakers/OFF Phase Over-Current
Protection Switch MCCB
Application
Our DZ15LED 10-40A 50-100A 100-250A/3902□ type multifunctional auto protective switch is mixed with the
protection functions of phase failure, over-current, short circuit
faults, able to provide the automatic protection for the motors
under AC 380V, 50Hz, also used to start motor non-frequently,
further to some degree, prevent the accident of distribution
transformer destroyed resulted from over-current because motors run
at failure of one phase caused one phase of drop out fuse melted
down.The merit of this switch has solved the problem that many switches
can't take action while the one phase of drop out fuse is melted
down, no matter drop out fuse melted down, low voltage fuse burnt,
one phase of three phase motor is broken, which make it run at
phase absence, it can perform the effective protection
Main Technical Data
1. Automatic switch overcurrent tripping characteristics table
| Rated current multiples | Action time |
| 1 | No action |
| 1.2 | <20min |
| 1.5 | <3min |
| 6 | To return time <1 s |
| 12 | <0.2 s |
2.Multi-functional automatic switch parameter
| Items | Data |
| Rated voltage | 380 |
| Rated current | 40,100,250 |
| Rated frequency | 50 |
| Number of segments | 3 |
| Over-current release rated current | 40,60,100,250 |
| Off phase action time | ≤3 |
| Motor leakage current | 75 |
Structure and working principle
This protective switch is a comprehensive switch for motor with
fast response, all parts assembled in bakelite shell. (Working
theory as picture 1)
The signal of phase failure come from three series connected CTs.
When the motor run at phase absence, the CT will output a signal of
phase failure, to touch off electric trigger and drive release to
open the switch, consequently protect the motor.
When motor happen to over-current or short circuit, the o/c release
will drive switch to open the line, (o/c and s/c releases have two
kinds: electronic type and hydraulic type), namely protect the
motor.
Normal operating conditions
Altitude: not higher than 2500m
No place rain and snow erosion;
No explosive medium and no corrosion and damage the insulation of
gas and conductive dust areas.
Matters need attention
Normally, we will provide the most suitable shipment method for
you. If the quantity is few, the goods will be sent by express when
the payment is clear. Also, we can transport the goods by air or by
sea, just according to your demand
profile
Baikong electric was born and developed wellSichuan Baikong
Electrical Technology Co., Ltd is a complete set of high and low
voltage power distribution equipment automation equipment, set
production, research and development and sales Import and export
services and other integrated enterprises, the company is
headquartered in Pengzhou Industrial Park, Chengdu City.The
company's main products are box-type substation Medium and high
voltage power transmission and distribution equipment, low voltage
power distribution equipment, fire electrical equipment,
intelligent industrial electrical equipment, new energy and energy
storage electrical equipment, metering and protection power
distribution equipment, high and low voltage complete switchgear,
high voltage ring network cabinet, cable branch box,SF6 inflatable
cabinet, etc.
Our MCCBs provide you unmatched circuit protection in alternative
energy, commercial, industrial, mining, and military applications
when protecting conductors against overloads and short circuits.
These circuit breakers are applied in panelboards, switchboards,
motor control centers, control panels, combination starters,
individual enclosures, and bus duct plug-in units.
