TAX Series

Molded Case Circuit Breakers

Reliable
 From 16A to 800A

The TAX range MCCBs provides safe

and easy solution for low voltage
electrical circuit protection.
Selection guide 1

Application, 2
Operating and Installation conditions

Technical Specifications 3

Accessories 6

Installations Dimensions 9
TECO MCCB's Selection Guide
TAX-□□□□ □ □ □□□ □□□□

Basic nominal Constitutional Number of Poles Rated Internal accessories

specifications functions current

125L Blank: for 3=3P 016=16A First：

125M distribution; A: 4 poles, no overcurrent 020=20A 2：Electromagnetic trip
125H M: for Motor tripping components are 025=25A 3：Reset trip
250L protection installed on the N pole, which 032=32A Last 3(bland=no accessories)
250M is always connect_x005f ed, 040=40A 080=L
250H not switched on or off along 050=50A 101=S (AC230V)
400L with the other three poles; 063=63A 102=S (AC400V)
400M B: 4 poles, no overcurrent 080=80A 103=S ( AC110V)
400H tripping compo nents are 100=100A 104=S ( AC24V )
630L installed on the N pole, which 125=125A 105=S ( DC24V)
630M switched on or off along with 140=140A 301=U ( AC230V)
630H with the other three poles; 160=160A 302=U ( AC400V)
800L the N pole is switched on first 180=180A 200=X
800M then off; 200=200A 181=L+S ( AC230V )
800H C: 4 poles, the N pole is 225=225A 182=L+S ( AC400V )
equipped with an 250=250A 183=L+S ( AC110V )
tripping component, and 315=315A 184=L+S ( AC24V )
the N pole is switched on or 400=400A 185=L+S ( DC24V )
along with the other three 500=500A 280=L+X
poles, the N pole is switched 630=630A 381=L+U ( AC230V )
first then off; 700=700A 382=L+U ( AC400V)
D: 4 poles, the N pole is 800=800A 401 =S ( AC230V ) +X
equipped with an 402=S ( AC400V ) +X
tripping component, and the 403=S ( AC110V ) +X
pole is always on, and it is not 404=S ( AC24V ) +X
switched on or off along with 405=S ( DC24V ) +X
the other three poles. 701=U ( AC230V ) +X
702=U ( AC400V ) +X
481=A+S ( AC230V )
482=A+S ( AC400V )
483=A+S ( AC110V)
484=A+S ( AC24V )
485=A+S ( DC24V )
780=U ( AC230V ) +A
781=U ( AC400V ) +A
600=X (左)+X (右)
680=X+A
800=A
880=A+A
Note：X-XAUX: Auxiliaries
L-ALT: Alert
A-AUX+ALT:Auxiliary alert
S-SHT: Shunt
U-UVT: Undervoltage

1
Scope of Application
TAX Range MCCBs is a new type of circuit breaker developed with
internationally
advanced design and manufacture technologies. Its rated insulation voltage
is
1000V, suitable for infrequent conversion and infrequent starting of motor in
circuits of AC 50Hz, rated operating voltage 690V and below, rated operating
current up to 800A. The MCCBs has overload, short-circuit and undervoltage
protection functions to protect the circuits and power supply from damage.
TAX Series MCCBs are featured with compact structure, small size, high
breaking,
short arcing, complete internal and external accessories.
Compliance with standards:
IEC60947-1, GB//T14048.1 General Provisions
IEC60947-2, GB//T 14048.2 Low-voltage Circuit Breakers
IEC60947-4, GB//T 14048.4 Electromechanical circuit breakers and motor
IEC60947-5-1，GB//T 14048.5 Electromechanical control circuit devices

Operating and installation conditions

◆The altitude of the installation location shall not exceed 2000m;
◆The ambient air temperature shall be -5℃ ~ +40℃, and the average temperature of 24 hours shall not exceed +35
℃;
◆The relative air humidity at the installation location shall not exceed 50% at the maximum temperature of +40℃.
At a lower temperature, the higher relative humidity may be higher, and the monthly mean minimum temperature of
the
wettest month shall not exceed +25℃; the mean maximum relative humidity of the month shall not exceed 90%, and
the
condensation occurs on the surface of the product due to temperature changes shall be considered.
◆Pollution level: 3
◆The installation category of the main circuit and undervoltage trip unit of the MCCB is III, and that of the other
auxiliaryand control circuits is II.
circuits
◆Applicable electromagnetic environment: A
◆Capable of withstanding the effects of humid air, salt spray, oil, mold, and nuclear industrial environment
◆Maximum installation inclination: ± 22.5
◆MCCB can work reliably when it is subjected to normal vibration of the ship.
◆MCCB can work reliably under earthquake conditions (4g)
◆MCCB shall be installed in a place where there is no danger of explosion and no conductive dust, no factors that
would metal or destory the insulation.
corrode
◆The installation site is free from rain and snow.
◆The circuit breaker has isolation function with the symbol

The cross-sectional area of the wire and the corresponding rated current

2
Technical Specifications

★ Optional
Note: The N poles of 4-pole products are on the right

3
MCCBs Protection Characteristics

The thermal type trip unit of the circuit breaker has the inverse time limit specificity;
the electromagnetic trip unit is instantaneous, and the characteristics are shown in the following table.

◆For Power Distribution

◆For Motor Protection

◆Power consumption sheet

◆Derating factors of rated operating current of thermal trip unit varying with ambient temperatures

◆Altitude capacity reduction

If the altitude exceeds 2000m of the applicable operating environment, the electrical performance of the
circuit breaker may refer to the following table.

4
Characteristic curve
Note: The following characteristic curves are measured under cold state and three-phase load.

TAX-125(16A-32A) action curve TAX-125(16A-32A) temp. compensation curve TAX-125(40A-125A) action curve

TAX-125(40A-125A) temp. compensation curve TAX-250 action curve TAX-250 temp. compensation curve

TAX-400 action curve TAX-400 temp. compensation curve TAX-630/800 action curve

TAX-630/800 temp. compensation curve

5
Internal Accessories

Internal electrical accessories for MCCBs

According to the needs of users, the accessoris can be directly connected to the wire (wire length is
50cm,the length can be specified) or connected to the end of the sub-row.

L-- Alarm switch

X-- Auxiliary switch
A-- Auxiliary alarm switch
S-- Shunt release
U-- Undervoltage release

Code Accessories TAX-125 TAX-250 TAX-400 TAX-630 TAX-800

208/308 Alarm switch L L L L L

210/310 Shunt release S S S S S

230/330 Undervoltage release U U U U U

220/320 Auxiliary switch X X X X X

Alarm switch+
218/318 L S L S L S L S L S
Shunt release

Auxiliary switch+
228/328 X L X L L X L X L X
Alarm switch

Alarm switch+
238/338 U A U A
Undervoltage release

Shunt release+
240/340 S X S X S X S X S X
Auxiliary switch

Undervoltage release+
270/370 U X U X U X U X U X
Auxiliary switch

Auxiliary alarm switch+

248/348 A S A S A S A S A S
Shunt release

Auxiliary alarm switch+

278/378 U A U A
Undervoltage release

Left auxiliary switch+

260/360 X X X X X X X X X X
right auxiliary switch

Auxiliary alarm switch+

268/368 A X A X A X A X A X
Auxiliary switch

280/380 Auxiliary alarm switch A A A A A

Auxiliary alarm switch+

288/388 A A
Auxiliary alarm switch

1 The first part of the code, 2 electromagnetic trip, 3multiple trip.

The last two are the internal accessory code, blank means no accessories

6
Internal Accessories & Functions

Shunt trip unit

◆Can be used for long distance trip of MCCB.
Note: When a DC24V shunt trip unit is selected, the power supply of the shunt
trip terminal must be ≥50W.

Undervoltage trip unit

◆When the power supply voltage drops to 35~70% of the rated voltage, the
circuit breaker is instantaneously tripped;
◆When the voltage is <35% Ue, it shall prevent the MCCB from closing; when
the voltage is ≥85% Ue, it shall ensure the close of the MCCB;
◆When applied, the power supply must be turned on before the MCCB can be
switched-on or off.

Auxiliary contacts
◆Used for indicating the on or off status of the MCCB;
◆One set of NO/NC is used for Inm 125, 250;
◆One set of 2NO/2NC is used for Inm 400, 630, 800.

Alarm contacts
◆Used to indicate the fault tripping state of the MCCB;
The alarm contacts do not operate when the MCCB is normally on or off, and
only operate under the situation of free trip or the fault trip. When the MCCB is
reclosed, the IT return to their original state.

Note: For all internal accessories except undervoltage release, if the installation
size is affected by external wiring terminals, lead-type accessories can be selected

7
CD2 type motor type electric operation mechanism

Used for electric ON/OFF operation of MCCB

Description:
P1-P2: external power inputs;
SB1, SB2: operation button (user-supplied)
Voltage specification: AC50Hz/60Hz 110V, 230V
DC24V, 110V, 220V
Symbol Description:
CD2 motor type wiring schematic SB1, SB2 are operation buttons (user-supplied)
Note: The dotted line frame is the wiring diagram X is the terminal block, P1 and P2 are external power inputs
of the internal accessories of the circuit breaker.

1. The square shafts of handles have three kinds of lengths: 50mm, 100mm, and 150mm (special
specifications shall be stated when ordering);
2. The 3-pole and 4-pole circuit breakers have the same parameters for turning handles.

8
Installation dimensions
■TAX-125 front-panel wiring installation dimensions (3P,4P)

■TAX-125 back-panel wiring installation dimensions (3P,4P)

■TAX-125 plug-in back-panel wiring installation dimensions (3P,4P)

■TAX-125 plug-in front-panel wiring installation dimensions (3P)

9
■TAX-250 front-panel wiring installation dimensions (3P,4P)

■TAX-250 back-panel wiring installation dimensions (3P,4P)

■TAX-250 plug-in back-panel wiring installation dimensions (3P,4P)

■TAX-250 plug-in front-panel wiring installation dimensions (3P)

10
■TAX-400 front-panel wiring installation dimensions (3P,4P)

■TAX-400 back-panel wiring installation dimensions (3P,4P)

■TAX-400 plug-in back-panel wiring installation dimensions (3P,4P)

■TAX-400 plug-in front-panel wiring installation dimensions (3P)

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■TAX-630 front-panel wiring installation dimensions (3P,4P)

■TAX-630 back-panel wiring installation dimensions (3P,4P)

■TAX-630 plug-in back-panel wiring installation dimensions (3P,4P)

■TAX-630 plug-in front-panel wiring installation dimensions (3P)

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■TAX-800 front-panel wiring installation dimensions (3P,4P)

■TAX-800 back-panel wiring installation dimensions (3P,4P)

■TAX-800 plug-in back-panel wiring installation dimensions (3P,4P)

■TAX-800 plug-in front-panel wiring installation dimensions (3P)

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Taian Technology (Wuxi) Co., Ltd.
No. 29, Gao Lang East Road, New District,China
Wuxi0510-85227555
Tel: City,
www.taian-tech.com

DISCLAIMER: Whilst every effort has been made to ensure the reliability of
the information is correct at time of publication, TECO cannot guarantee the
accuracy of all of the information contained herein. Changes/updates brought to
the attention of TECO, once verified, will be corrected in future editions.