Innovation, quality and reliability are the core values of our company. These principles today more than ever form the basis of our success as an internationally active mid-size company for Good Quality Moulded Case Circuit Breaker-FTM2 Supply to Auckland, We warmly welcome merchants from home and abroad to call us and establish business relationship with us, and we will do our best to serve you.

Product Features

The FTM2 series of moulded-case circuit-breakers can be equipped with:

- thermomagnetic trip units, for direct and alternating current network protection, using the physical properties of a bimetal and an electromagnet to detect the overloads and short-circuits;

- electronic trip units, for alternating current network protection. Releases with microprocessor technology obtain protection functions that make the operations extremely reliable and accurate. The power required for operating them correctly is supplied straight from the current sensors of the releases. This ensures that they trip even in single-phase conditions and on a levelwith the minimum setting.

- Small size,compact design

- With the same frame size, the circuit breakers are available wi th different breaking capacities and different rated currents.

- Widely adjustable electronic trip units

- Frames made of rigid materials of recyclable enginnering plastics,

- Modular and easy-to-fit internal accessories

- The internal accessories are extremely easy to install. No tools are required because they are simply snapped into place in the accessories compartments to the left and right of the handle.

Technical Data

Frame size		160			250
Model		FTM2-160C	FTM2(Z)-160L	FTM2(Z)-160H	FTM2(Z)-250L	FTM2(Z)-250H	FTM2-400C
Rated current (A)	FTM2	20,25,32,40,50,63,80,100,125,160			160180200225250
	FTM2Z	63(25-63), 160(64-160)			250(100-250)

Frame size		400					800
Model		FTM2-400C		FTM2(Z)-400L		FTM2(Z)-400H	FTM2-800C		FTM2(Z)-800L		FTM2(Z)-800H
Rated current (A)	FTM2	20,25,32,40,50,63,80,100,125,169					160180200225250
	FTM2Z	63(25-63), 160(64-160)					250(100-250)
Number of poles		3-Poles,4-Poles
Rated voltage (V) AC		400
Rated insulationvoltage(V)		690
Rated impulse withstand voltage Uimp(KV)		6
Rated frequency		50/60Hz
Ultimate short-circuit capacity Icu (KA)		40			50	70	40			50		70
Service short-circuit capacity Ics (KA)		28			50	50	28			50		50
Electrical life:		3,500
Mechanical life:		13,000
Arcing distance(mm)		Zero
Ambient temperature (°C)		-5°C ~ +40°C
Altitude (m)		≦2000m
Atomospheric conditions		When the ambient air temperature is +40℃, the relative humidity of the air shall not be higher than 50%; a higher relative humidity is allowed at a lower temperature; for the wettest month, the maximum relative humidity averaged shall be 90% while the lowest temperature aeraged in that month +25℃,and the condensation produced due to temperature change shall be taken into consideration,
Pollution degree		Ⅲ
Connection		Front connection plate,rear connection plate,plug-in rear connection plate
Dimensions		L	257					275
		W	3-Pole:140 4-Pole:184					3-Pole:210 4-Pole:280
		H1	95					95
		H	153					153

Frame size		160			250
Model		FTM2L(Z)-160L		FTM2L(Z)-160H	FTM2L(Z)-250L		FTM2L(Z)-250H
Rated current (A)	FTM2L	20,25,32,40,50,63,80,100,125,160			160,180,200,225,250
	FTM2LZ	63(25～63 adjustable), 160(64～160 adjustable)			250(100～250 adjustable)
Number of poles		3-Poles,4-Poles
Rated insulation voltage(V)		690
Rated impulse withstand voltage Uimp(KV)		6
Rated frequency		50/60Hz
Ultimate short-circuit capacity Icu (KA)		50		70	50		70
Service short-circuit capacity Ics (KA)		50		50	50		50
Electrical life:		5,000
Mechanical life:		20,000
Arcing distance(mm)		Zero
Ambient temperature (°C)		-5°C ~ +40°C
Altitude (m)		≦2000m
Atomospheric conditions		When the ambient air temperature is +40℃, the relative humidity of the air shall not be higher than 50%; a higher relative humidity is allowed at a lower temperature; for the wettest month, the maximum relative humidity averaged shall be 90% while the lowest temperature aeraged in that month +25℃,and the condensation produced due to temperature change shall be taken into consideration,
Pollution degree		Ⅲ
Connection		Front connection plate,rear connection plate,plug-in rear connection plate
Dimensions		L	155			165
		W	3-Pole:90 4-Pole:120			3-Pole:105 4-Pole:140
		H1	68.5			69.5
		H	100			105

Frame size		400			800
Model		FTM2L(Z)-400L		FTM2L(Z)-400H	FTM2L(Z)-800L		FTM2L(Z)-800H
Rated current (A)	FTM2L	250,315,350,400			160,180,200,225,250
	FTM2LZ	400(160～400 adjustable)			800(320～800 adjustable)
Number of poles		3-Poles,4-Poles
Rated insulation voltage(V)		690
Rated impulse withstand voltage Uimp(KV)		6
Rated frequency		50/60Hz
Ultimate short-circuit capacity Icu (KA)		50		70	50		70
Service short-circuit capacity Ics (KA)		50		50	50		50
Electrical life:		3,500
Mechanical life:		13,000
Arcing distance(mm)		Zero
Ambient temperature (°C)		-5°C ~ +40°C
Altitude (m)		≦2000m
Atomospheric conditions		When the ambient air temperature is +40℃, the relative humidity of the air shall not be higher than 50%; a higher relative humidity is allowed at a lower temperature; for the wettest month, the maximum relative humidity averaged shall be 90% while the lowest temperature aeraged in that month +25℃,and the condensation produced due to temperature change shall be taken into consideration,
Pollution degree		Ⅲ
Connection		Front connection plate,rear connection plate,plug-in rear connection plate
Dimensions		L	257			275
		W	3-Pole:140 4-Pole:184			3-Pole:140 4-Pole:184
		H1	95.0			97.5
		H	153			153

Initial status

Cold status

Right after test 1

Initial status

Cold status

Right after test 1

16～256s step 4s

(2～10)Ir1,OFF step 0.05Ir1

(0.05～0.3)s step 0.05s

Technical data of intelligent trip unit

LED function indication:

- LED on with steady green light indicating that the trip unit is supplied correctly; LED with flashing red light, indicates fault diagnosis

- LED with flashing yellow light, indicates pre-alarm for current exceeding 0.9xI;

- LED with steady red light,indicates current exceeding 1.2xIn for

Front panel indication

1. Electronic tripping test interface
2. adjustable setting of long time-delay current
3. adjustable setting of long time-delay time
4. adjustable setting of short time-delay trip current
5. adjustable setting of short time-delay time
6. adjustable setting of instantaneous trip current
7. adjustable setting of earth fault trip current

 Operating keys for setting tripping parameters

1.     ENTER button to confirm data or change pages
2.     ESC Button to exit submenus or cancel operations   
3.     scroll up(Cursor UP button)
4.     scroll down(Cursor DOWN button)     Electronic trip unit test interface

 Telecommunication trip unit

The main protection function: long time-delay overload protection, short time-delay short circuit protection, instantaneous short circuit protection, residual current protection, ground-fault protection.

telecommunication interface:

- The trip unit allows the circuit breaker to be integrated in a communication network based on the Modbus protocal,the devices provide standard RS485 interface as the physical means for tada transmission. It allows a wide range of information to acquired and transmitted remotely.

- programming the electronic trip unit in remote mode;

- to know the state of the circuit breaker(open/closed/tripped) in remote mode.

 Tripping curve

A failed cutout 3 blocks away caused a surge and tripped the utility breaker. Procedure is to inspect the surge absorber for damage and reset. The reason I said leave the door open at ~0:36 is if there is a fault it will just blow out the open door rather than make a bomb out of it. This is a 1200A 120/208 service served by a 3.2Z 450KVA transformer 25 feet away (electricaly) with a 0.2 s clearing time on the load side an arcing fault is 19C. May seem a bit much but Im not the one to take a chance if there is a problem esp when dealing possible hidden damage due to surges and lightning. When surges and lightning happen they can leave conductive deposits and damage equipment in ways that dont show up untill its energized.
The noise in the background is the generator. The large grey cabinet is the automatic transfer switch, the small grey cabinet is the surge absorber, the silver cabinet contains the CT’s (current transformers) for the electric meter and the green cabinet is the transformer.