Buchholz Relay
Single Phase Buchholz Relay
Three Phase Buchholz Relay
Buchholz relay in a transformer is an oil container housing the connecting pipe from the main tank to the conservator tank. It has mainly two elements. The upper element consists of a float. The float is attached to a hinge in such a way that it can move up and down depending upon the oil level in the Buchholz relay Container.
LV power air circuit-breakers
and switch-disconnectors
Masterpact Merlin Gerin
Masterpact circuit breakers are used to
protect and control low-voltage distribution
systems. They may be installed in main LV
switchboards (incoming units, main and
secondary outgoers). Masterpact is a
complete range offering a large selection of
performance levels:
c ratings from 800 to 6300 A AC,
from 1000 to 8000 A DC;
c breaking capacity from 40 to 150 kA rms;
c operational voltages 690 V AC,
1000 V DC.
VACCUM CIRCUIT BREAKER
ALL TYPE OF ABB VACCUM CIRCUIT BREAKER
VD4 12.12.25 , VD4 12.12.40, VD4 07.12.25.... MANY MORE
11 KV , 33KV .
VD4Medium voltage vacuum circuit-breaker12 kV - 1250...4000 A - 63 kA36/40.5 kV - 630...3150 A - 16...40 kAMedium Voltage Products
The VD4 are a synthesis of the renownedtechnology in designing and constructing vacuuminterrupters embedded in resin poles, and ofexcellency in design, engineering and productionof medium voltage circuit-breakers.Embedding the interrupter in resin makes thecircuit-breaker poles particularly sturdy andprotects the interrupter against shocks, accumula-tion of dust and humidity.The vacuum interrupter houses the contacts andmakes up the interrupting chamber.
BRAND: L&T MCCB
DU/DY With Thermal - Magnetic Release
DU MCCB Range
2 Pole / 3 Pole / 4 Pole MCCBs
DU250C/DU250/DU400N MCCBs
DTH With Thermal - Magnetic Release
Conforms to IS/IEC 60947-2
l 25kA, 36kA, 50kA & 70kA breaking capacities
l Adjustable short-circuit settings: 6 - 10 x In**
l Manual, Rotary and Motorised versions available@
l 20A to 630A, 3P & 4P
l Adjustable overload settings: 0.8 - 1.0 x In
l Ics= 100% of Icu*
l Wide range of accessories
BRAND :L&T MCCB
DU/DY With Thermal - Magnetic Release
DU MCCB Range [8536]
3 Pole / 4 Pole MCCBs , 2 Pole / 3 Pole / 4 Pole MCCBs , DU250C/DU250/DU400N MCCBs
DTH With Thermal - Magnetic Release
BRAND : SCHNEIDER MCB
6A - 32A Single Pole Schneider Miniature Circuit Breaker.
Product Specification
No.of poles 1-4 Pole
Rated current 6 to 63 A
Voltage 240-415 V
Breaking Capacity 10 kA
Frequency 50 Hz
Curve Type B and C tripping curves
Brand Schneider
ABB MCB
System pro M compact S200M miniature circuit breakers are current limiting. Theyhave two different tripping mechanisms, the delayed thermal tripping mechanism foroverload protection and the electromechanic tripping mechanism for short circuitprotection. They are available in different characteristics (B,C,D,K,Z), configurations(1P,1P+N,2P,3P,3P+N,4P), breaking capacities (up to 10 kA at 230/400 V AC) and ratedcurrents (up to 63A). All MCBs of the product range S200M comply with IEC/EN 60898-1 and IEC/EN 609 47-2, allowing the use for residential, commercial and industrialapplications. Bottom-fitting auxiliary contact can be mounted on S200M to save 50%
What is MCCB. MCCB stands for Molded Case Circuit Breaker. It is another type of electrical protection device which is used when load current exceeds the limit of a miniature circuit breaker. The MCCB provides protection against overload, short circuit faults and is also used for switching the circuits.
DZ47 AC MCB circuit breaker series is used in lighting distribution system or motor distribution system for protecting overload and short-circuit condition. The product is light in weightreliable and excellent in performance.
It has high breaking capacity up to 6kA. Its case and items are adopted with high fire-resistant and shock proof plastics. Mainly used in AC 50/60Hz single-pole 230V or two three four-pole 400V circuit for overload and short circuit protection as well as for on-off switching electric equipment and lighting circuit. The product complies with EN/IEC60898.
Rated current(In) 1A, 2A, 3A, 4A, 6A, 10A, 13A, 16A, 20A,
25A ,32A ,40A, 50A, 63A, 100A Optional
Rate voltage(Un) 230VAC / 415VAC / 400VAC / 415VAC Optional
Breaking capacity 6kA
Rated frequency 50/60Hz
Tripping charateristics BCD
Number of poles 1P, 2P, 3P, 4P, 1P+N, 3P+N Optional
Rated impulse withstand voltage(Uimp) 4kV
Electrical endurance 10000cycles
Mechanical endurance 10000cycles
Terminal Pillar type
CBM-II Series circuit breaker manager (CBM) is an integrated control relay, designed for 3KV to 35KV indoor switchgear, used for replace multiple components in LV compartment, can reduce LV panel space occupation.
On it's panel it provide primary circuit simulation diagram, switch indicator, VCB status & control switch, environment control, high voltage indicator etc. Special sound prompt function can remind staff to operate the switchgear safely.
It can be used in various types of switchgear such as GZS (Centrally Installed Switchgear), Handcart Cabinet, Fixed Cabinets, Ring Main Unit, etc.
POCT is like a vaccine for power accidents. It can accurately detect the fault current and trip the circuit breaker within 0.02 seconds (faster than IEEE-39.07 std. 0.025~0.033 seconds), effectively avoiding the expansion of short-circuit accidents.
The high-voltage circuit breakers in the world can only trip when there is control/working power supply.
But Long Men POCT can work without power
POCT completed all functions and seismic verification and certification in 2018, wining glory for Taiwan. So far, it has obtained invention 12 patents in 10 countries (U.S.A, U. K., Germany, France, Russia, India, China, Japan, South Korea, Taiwan) and 10 awards from 6 countries.
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