IDM1, IDM8 plastic case circuit breaker

Use

The IDM1 and IDM8 plastic case circuit breakers (hereinafter referred to as circuit breakers) are one of the new types of circuit breakers developed by the factory using international leading design and manufacturing technology. According to the high and low rated limit short-circuit breaking capacity (Icu), they are divided into four types: C type (basic type), L type (standard type), M type (higher breaking type), and H type (high breaking type). The product is small in size, high in breaking, and short in arcing (some specifications have zero matrices). They are ideal for use on land and ships because they are vibration resistant. The rated insulation voltage is 660 volts (500 volts for IDM1/IDM8-63) and is suitable for infrequent switching and infrequent starting of motors in circuits with AC 50Hz and 660V or less. The circuit breaker has overload, short-circuit and voltage protection functions to protect line power equipment from damage.

The circuit breaker can be installed vertically or horizontally.

Working environment and installation conditions

1. The altitude is not more than 2000m or below.

2. The surrounding air temperature is +40°C (+45°C for marine products) and not less than -5°C.

3. Resistant to humid air.

4. Resistant to salt spray and oil spray.

5. Resistant to the effects of mold and mildew.

6、Maximum slope of 22.5°.

7、It can work reliably when subjected to normal vibration of the ship.

8、No danger of explosion in the medium, and the medium is not sufficient to corrode metals and destroy the insulation of the gas and conductive dust place.

9、In the place where there is no rain or snow attack.

Model specification meaning 

Note:

1) 6A specifications only electromagnetic (instantaneous) type.

2) with () is not recommended specifications

2、According to the wiring method is divided into three types: wiring in front of the board, wiring behind the board and inserting in.

3, according to the overcurrent decoupler type is divided into thermal dynamic electromagnetic (compound) type, electromagnetic (instantaneous) type two. According to the rated current (A) of the overcurrent decoupler: IDM1/IDM8-63 for (6) 10, 16, 20, 25, 32, 40, 50, 63A nine levels; IDM1/IDM8-125 for (10) 16, 20, 25, 32, 40, 50, 63, 80, 100, 125A ten levels; IDM1/IDM8-250 for 100 IDM1/IDM8-250 is 100, 125, 140, 160, 180, 200, 225, 250A; IDM1/IDM8-400 is 225, 250, 315, 350, 400A; IDM1/IDM8-630 is 400, 500, 630A; IDM1/IDM8-800 is 630, 700, 800A; IDM1/IDM8-1600 is 800A. /IDM8-1600 is 800, 1000, 1250 and 1600A.

Note:

(1) No code for circuit breakers used for power distribution: 2 for motor protection; C for ship; and TH for "three-proof".

(2) No code for direct manual operation: electric operation is shown in table P.

(4) There are two types of appurtenances: with and without appurtenances.

There are four types of internal devices, namely, shunt detriggers, ⽋ voltage detriggers, auxiliary contacts, and alarm contacts, and four types of external devices, such as manual operation mechanism and electric operation mechanism.

Warning for use.

1. The rotating handle operating mechanism used in the product is provided by the factory to ensure quality. If the users purchase the product by themselves, please purchase a reliable quality factory, otherwise the factory will not be responsible for all the consequences after installation.

2. After the product and the decoupling device have tripped, the electric and manual operating mechanisms must be made to close the gate only after the handle has been re-clasped (the direction of the handle re-clasp and the direction of disconnection).。

Uses 

1、Circuit breaker thermal-action type decoupler with anti-time eye characteristics, electromagnetic decoupler for instantaneous action, the characteristics are shown in Table 1 (for power distribution) Table 1

Note: Motor protection circuit breaker 1.0In does not operate, the time are 2h; action current is 1.20In (hot state), the action time are 2h. electromagnetic decoupling action current is 12In±20% (A)

2、Breaking capacity, see Table 2

Note: The distance to the manufacturer includes vertical and horizontal installation.

Technical data of accessory devices

1、The ratings of the auxiliary contacts and alarm contacts are shown in Table 3

2、When the working voltage of the shunt release is between 70% and 110% of the rated power supply voltage, it can reliably break the circuit breaker.

3. When the power supply voltage drops to within 70%~35% of the rated operating voltage of the voltage release device, the voltage release device can reliably break the circuit breaker; when the power supply voltage is lower than 35V of the rated operating voltage of the voltage release device, the voltage release device can prevent the circuit breaker from closing; when the power supply voltage is higher than 35V of the rated operating voltage of the voltage release device, the voltage release device can prevent the circuit breaker from closing. When the power supply voltage is higher than 85% of the rated working voltage of the voltage release device, the voltage release device can ensure reliable closure of the circuit breaker.

4. See Table 4 for the rated current of the connecting conductor and the cross-sectional area to match.

5. The various characteristics and accessories of the circuit breaker are set by the manufacturer and cannot be adjusted at will during use.

6.When the handle is in the unbuttoned position, the handle should be pulled downward to make the circuit breaker buckle again and then close the circuit breaker.

Release type and accessory code

Electric control circuit breaker closing or breaking its action value

(a) The circuit breaker should be able to ensure reliable closure between no-load and rated short-circuit turning capability at any voltage between 85-110% of the given control supply voltage when the circuit breaker is operated electrically.

(b) The shunt release can work reliably at any voltage between 70-110% of the rated control supply voltage.

c) The under-voltage striker and the striker shall operate within the rated working voltage of 70-35%.

Structural features and working principle

This series of circuit breaker has the characteristics of small size, high short circuit breaking capacity, small flying arc distance and anti-vibration. When the overload current or short-circuit current reaches or exceeds its specified value, the circuit breaker will automatically trip, thus cutting off the power supply and protecting the equipment on the load side.

Form and mounting dimensions 

IDM1, IDM8-63~800 board front wiring profile installation size chart

Behind the board wiring form factor drawing

IDM1, IDM8 series inserted external dimensions and mounting hole opening dimensions