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MODbreak and MODpower Circuit Breakers - NHP Flipbook PDF
MODbreak and MODpower Circuit Breakers Your economical power distribution solution Sales 1300 NHP NHP nhp.com.au Sales 0
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MODbreak and MODpower Circuit Breakers Your economical power distribution solution
POWER DISTRIBUTION AND PROTECTION
NHP Electrical Engineering Products Pty Ltd
Sales 1300 NHP NHP Sales 0800 NHP NHP
nhp.com.au nhp-nz.com
WE’RE easy to do business with
At NHP we’re solely committed to serving the needs of our customers in the industrial electrical industry. From concept design through to installation and after sales service, we are confident we have the experience and expertise to exceed your expectations and ensure you get the best result for your project. How? By combining Partnerships, Agility, Knowledge and Scalability, NHP can offer 100% Australian owned service that forms the ultimate choice in our industry.
Partnerships:
Agility:
When you choose NHP you gain a valuable industry partner. You gain access to an exclusive network of quality global suppliers who, together with NHP, can achieve an engineered solution for your industrial electrical application. A partnership with NHP promises to last, working together with you to offer complete trust, assurance and peace of mind.
At NHP we understand your project needs and know that these needs can often change throughout the life cycle of a project. With a seamless combination of local and technical support backed by around the clock service and local stock, NHP has the agility to provide real time solutions where and when you need them.
Knowledge:
Scalability:
If your industrial electrical application demands a specialist team of trained project management, design and engineering professionals, then NHP is the ultimate choice, bringing together over 40 years of electrical industry experience and knowledge.
With all the scale of a large multi-national company, NHP maintain a premium level of customer service and attention to detail no matter how big or small your project. With over 900+ expert staff in over 50+ branch and regional locations, when you deal with NHP you receive all of this combined knowledge and expertise delivered by local people with with a local focus, backed by global suppliers.
NHP ELECTRICAL ENGINEERING PRODUCTS PTY LTD
Sales 1300 NHP NHP | nhp.com.au |
MODbreak and MODpower Your economical Power Distribution Solution NHP are proud to introduce the new MOD series range of economical power distribution Moulded Case Circuit Breakers (MCCBs) and Air Circuit Breakers (ACBs). The MODbreak and MODpower family of products offer a complete range of circuit breakers from 20 to 3200 amps and are ideally suited to the commercial building market as well as contractors and mechanical services. The MOD series includes a complete suite of accessories to complement the range including remote operation, safety shrouds, off position padlocking and much more.
MODpower
Ensuring free and easy selectivity software for use with the MOD series range, NHP has also developed MODcurve. This software enables customers to make informed decisions regarding the electrical protection of their installation from product selection through to trip settings. The MOD series also empowers users to upgrade their circuit breakers to suit their requirements thanks to the design that offers increased flexibility and easy customer fit accessories.
MODbreak
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Moulded Case Circuit Breakers Range
MB4: 800-1250A
MB3: 400-630A
MB2: 63-250A
Features: • From 16 A to 1250 A
• MCCBs for distribution systems
• 3 Pole and 4 Pole
• Manual, rotary handle or motorised versions
• Choice of 36kA and 50kA breaking capacities.
• Wide range of internal and external accessories
• Icu = Ics
• Chassis options
• With Electronic and Thermal Magnetic protection relays
• Transfer switches and controllers
OCR options
Features of Thermal Magnetic OCR
Features of MTX1 Electronic OCR
• Adjustable overload setting 80% to 100% of ln • Adjustable magnetic short circuit setting 6 – 10 ln
• Overload protection LT with selectable inverse time delay
• Push to trip button
• Adjustable Short Time ST characteristic
• True RMS sensing
• Short circuit (ST) characteristic with selectable time delay
• Infinite adjustment thermal and magnetic dials • Refer ratings chart for additional setting details
• LT and ST characteristic can be switched OFF • Fixed instantaneous trip • DIP switch OCR setting • Push to trip button • Thermal memory enable / disable • Power ON/pick up LED • Self powered protection • True RMS sensing
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Moulded Case Circuit Breakers Technical advantages Standard charateristics
Markings & configuration
• Uimp : Impulse withstand voltage • Ue : Rated operatioal voltage
Removable front terminal cover
• Ucu : Ultimate breaking capacity • Ucs : Service breaking capacity
CE (european conformity)
• Utilisation category
NHP MCCB type reference
Main contacts position indication
Appliable standards Operating toggle
Removeable OCR cover
Trip button
Pick-up LED (electronic MCCB’s)
Current rating of MCCB behind cover
Over current release setting behind cover
Terminal connections behind cover
• Faster tripping
• Low watts loss
The unique speed contact system accelerates the opening of contacts during short circuit. This ensures faster tripping for current limiting.
The entire current carrying path is designed to achieve a very low watt loss
The result-very low let-through, cut-off current and fault clearing time • Mechanical anti-reclosing
This unique feature ensures that under short circuit conditions, the contacts open and latch even before the release gives a trip command to the mechanism.
• Positive isolation The MCCB toggle indicates the true position of the main switching contacts • Double insulation
Internal accessories are housed in insulated casings to ensure a first level of insulation. When the front cover is opened for the fixing of internal accessories, the MCCB is totally insulated ensuring double insulation.
This avoids contact re-closing and bounce
Forward or reverse connection MODbreak MCCBs can be forward or reverse connected to allow reversal of line and load connections. This is especially important for MB and MBC chassis where MODbreak MCCBs are reverse connected on the chassis as standard.
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MODbreak Moulded Case Circuit Breakers Technical data MCCB Ampere Frames (AF) MCCB Types
250 A
400A
630A
MB2
MB3
MB3
D
N
Poles
D
N
3 or 4
3 or 4
Thermal magnetic dial adjustment range
Thermal Magnetic & Electronic 0.8 to 1.0 x In and 6 – 10 x Im
MB4 N
N
3 or 4
3 or 4
63, 160, 250, 320, 400
63, 160, 250, 320, 400, 630 A
800, 1000, 1250
Thermal Magnetic & Electronic 0.8 to 1.0 x In and 6 – 10 x Im
Thermal Magnetic & Electronic 0.8 to 1.0 x In and 6 – 10 x Im
Electronic -
OCR (Over Current Relay) dataOCR (Over Current Relay) data 63, 100, 125, 160, 200, 250 Current Ratings of OCRs (A) OCR types
D
800/1000/1250
MTX1 Electronic OCR data OCR adjustments
via DIP switches
Adjustment range (LT)
0.4 to 1.0 in steps of 0.05 or OFF
Adjustment of LT time delay Ir
10s at 6 Ir or 3s at 6 Ir and 10s at 7.2 Ir or 3s at 7.2 Ir
LT Thermal memory
Enable / Disable (θ = ON or 0 = OFF)
Adjustment range (ST) Ir
1.5, 2.5, 4, 5.5, 6.5, 8 x Ir
Short time setting time delay
100ms / Instantaneous or OFF
Fixed Instantaneous OCR setting
10 x In
10 x In
MCCB data Impulse withstand Voltage (kV)
8
8
8
8
690
690
690
690
750 AS/NZS / IEC / CE
750 AS/NZS / IEC / CE
750 AS/NZS / IEC / CE
750 AS/NZS / IEC /CE
Rated Operational Voltage (V) (max) Rated Insulation Voltage (V) Standard and approvals
AS/NZS 60947.2 IEC-60947-2
230 / 240 V AC 400 / 415 V AC
65 36
85 50
65 36
85 50
65 36
85 50
85 50
500 V AC
25
36
25
36
25
36
25
550 V AC
18
25
15
20
15
20
20
IcU
600 V AC
16
18
12
18
12
18
16
kA
690 V AC
10
15
8
15
8
10
10
250VDC (3P in series)
15
25
15
25
15
25
-
500VDC (3P in series) L/ R