XUW1 Air Circuit Breaker

Scope of application

XUCKY Electric brand's XUW1 Air Circuit Breaker, ACB (hereinafter referred to as circuit breaker) is suitable for distribution network with AC 50Hz, rated voltage to 660V (690V) and below, the rated current 630A~6300A, used to distribute power and protect line and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. Air Circuit Breaker have intelligent protection function, selective protection is precise, can improve power supply reliability and avoid unnecessary power outages. At the same time, it has an open communication interface to carry out "Four Remotes" to meet the requirements of the control center and automation system. The circuit breaker has an impulse withstand voltage of 8000V at 2000 meters (revised at different altitudes, not exceeding 12000V). The acb air circuit breaker are not equipped with intelligent controller and sensor, and can be used as isolator.

XUCKY is a professional air circuit breaker manufacturers The acb air circuit breaker meets the GB14048.2 "Low-voltage switchgear and controlgear Low-voltage circuit breakers" and IEC60947-2 "Low-voltage switchgear and controlgear circuit breakers" and other standards.

● Classification

According to the installation method: fixed type, drawer type.

According to the poles: three poles, four poles. According to the operating mode: electric operation, manual operation (overhaul, maintenance).

● Release type

Intelligent controller, under-voltage transient (or delay) release, shunt release.

● Intelligent controller performance

a. The intelligent controller of Air Circuit Breaker is divided into: bse5 (H type: communication), bse4 (M type: common intelligent type), bse3 (L type: economic type);

b. With overload long delay inverse time limit, short delay inverse time limit, definite time limit, instantaneous function. Users can set their own required protection characteristics;

c. Single-phase grounding protection function;

d. Display function: setting current display, operating current display, main display of each phase voltage (voltage display should be put forward when ordering);

e. Alarm function: overload alarm;

f. Self-check function: overheating self-check, microcomputer self-diagnosis;

g. Test function: Test the operating characteristics of the controller.

Normal working conditions and installation conditions

● Ambient air temperature

The upper limit value does not exceed +40°C, the lower limit value is not less than -5°C, and the average value in 24h does not exceed +35°C. Note: The working condition is that lower limit value is -10°C or -25°C, the user should declare with the company; The upper limit exceeds +40°C or the lower limit is lower than -10°C or -25°C working conditions, users should consult with the company.

● The altitude of the installation site does not exceed 2000m.

● Atmospheric conditions of Air Circuit Breaker

Atmospheric relative humidity does not exceed 50% when the ambient air is +40°C. It can have relatively high relative humidity at lower temperatures. The monthly average maximum relative humidity of the wetest month is 90%. The average minimum temperature is +25°C and consider the condensation that occurs on the product surface due to temperature changes. Exceed the required requirements and consult with the company.

● Protection level: IP30

● Pollution level: III

● Use category: Class B or Class A

● Installation category: acb air circuit breaker and undervoltage release with rated operating voltage of 660V (690V) or less. The primary coil of the power transformer is used for installation category IV. The installation category of the auxiliary circuit and control circuit is III.

● Installation conditions: The circuit breaker shall be installed in accordance with the requirements of this manual. The vertical inclination of the circuit breaker shall not exceed 5° (the inclination of the mine circuit breaker shall not exceed 15°). Brief introduction of structure

● The positive indication of the circuit breaker

Technical data and performance

● Rated current of circuit breaker

Frame rated current Inm (A) Rated current In (A)

2000 630, 800, 1000, 1250, 1600, 2000

3200 2000, 2500, 2900, 3200

4000 3200, 3600, 4000

6300 4000, 5000, 6300

● Rated short-circuit breaking capacity and short-time withstand current, the circuit breaker's arc distance is zero (that is, no arcing outside the circuit breaker).

Frame rated current Inm (A) 2000 3200 4000 6300

Rating limit short circuit breaking capacity Icu(kA)O-CO 400V 80 100 100 120

690V 50 65 65 80

Rating limit short circuit making capacity n×Icu(kA)/cosΦ 400V 176/0.2 220/0.2 220/0.2 264/0.2

690V 105/0.25 143/0.2 143/0.2 187/0.2

Rated operation short circuit breaking capacity Ics(kA)O-CO-CO 400V 50 65 65 80

690V 40 50 50 70

Rated short-time withstand current

Icw(kA)1s, delay 0.4s, O-CO 400V 50 65 65/80(MCR) 85/100(MCR)

690V 40 50 50/65(MCR) 65/75(MCR)

Note: The breaking capacity of the upper and lower lines in the table is the same

● Protection characteristics and functions of intelligent overcurrent controller

Protection characteristics of overcurrent controller

1. The setting value Ir (I/In) and error of the controller

Long delay short delay Instantaneous Ground Fault

Ir1 Ir2 error Ir3 error Ir4 error

(0.4-1)In (0.4-15)In ±10% In~50kA(Inm=2000A)

In~75kA(Inm=3200~4000A)

In~100kA(Inm=6300A) ±15% Inm=2000~4000A

(0.2~0.8)In

Max 1200A, Min 160A Inm=6300A

(0.2-1.0)In ±10%

Note: When there is (required) three-stage protection at the same time, the setting values cannot be crossed.

2. Long-delay overcurrent protection inverse-time operation characteristics I²TL=(1.5lr1)²tL, and the operation time of (1.05~2.0)lr1 is shown in Table 4, and the time error is ±15%.

Note: tL-Long delay 1.5lrs setting time, TL-Long delay operation time.

Note: When there is (required) three-stage protection at the same time, the setting values cannot be crossed.

1.05Ir1 1.3Ir1 1.5Ir1 setting time (s) 15 30 60 120 240 480

＞2h non-operation ＜1h opetation 2.0Ir1 opetation time (s) 8.4 16.9 33.7 67.5 135 270

3. Short delay over-current protection characteristics

Short-time delay over-current protection is definite time limit. If the low multiple is required to be inverse time, the characteristic is: I²Ts=(8Ir1)²ts, ts is the general delay design time;

When the overload current >8Ir, it automatically converts to the definite time characteristic. Its definite time limit characteristic is shown in Table 5. The time limit error is ±15°C.

Delay time s Returnable time s

0.1 0.2 0.3 0.4 0.06 0.14 0.23 0.35

Wiring Diagram of Circuit Breaker

1. Wiring diagram of L, M type intelligent controller (standard type) (see Figure 1)

SB1 - Shunt button (user-supplied)

SB2 - Undervoltage button (user-supplied)

F - Shunt release

O - Normally Open Contact (3A/AC380V)

C - Normally closed contact (3A/AC380V)

Q - Undervoltage instantaneous release or undervoltage delay release

M - Energy storage motor

SB3 - Closing button (user-supplied)

X - Closing electromagnet

DF - Circuit breaker auxiliary contact

1# Work power input end (DC module for positive input)

2# Work power input end (DC module for negative input)

25#, 26# External center pole or ground current transformer input

19#, 20#, 21#, 22#, 23#, 24# are Frame II and III adding contacts.

3# Fault trip, normally closed contact output

4# Fault trip, contact output common end

5# Fault trip, normally open contact output

* When the power supply for the intelligent release is DC power supply, the power supply module must be added. (1# and 2# terminals are prohibited from accessing the AC power supply).

2. Wiring diagram of M, H intelligent controller + additional function (multi function) (see Figure 2)

SB1 - Shunt button (user-supplied)

SB2 - Undervoltage button (user-supplied)

F-Shunt release

O-Normally Open Contact (3A/AC380V)

C- Normally closed contact (3A/AC380V)

Q - Undervoltage instantaneous release or undervoltage delay release

M - Energy storage motor

SB3 - Closing button (user-supplied)

X - Closing electromagnet

DF - Circuit breaker auxiliary contact

1#, 2# Output power input

3#, 4#, 5# Fault trip contact output

And 4# line is public end

6#, 7# Breaker status first auxiliary contact output end

8#, 9# Breaker status second auxiliary contact output end

10# Communication interface outlet A end

11# Communication interface outlet B end

12#, 13# First signal contact output end

14#, 15# Second signal contact output end

16#, 17# Third sets of signal contact output end

18#, 19# Fourth sets of signal contact output end

20# Protection ground line

21# N phase voltage input end

22# A phase voltage input end

23# B phase voltage input end

24# C phase voltage input end

25# External transformer input end 1

26# External transformer input end 2