ERM- RING MAIN UNIT (RMU)
The development of the current power system focuses on the usage of ecological resources. Low power loss, low maintenance spending, reliable performance, flexible configuration are required on the medium voltage switchgear. Due to its features such as long service life, compact size, and recycling, Energypac ERM ring main units have proved successful in terms of economy and ecology. It appears more important for underground cabled power distribution network in improving its devices and other aspects, with the rapid development of urbanization; ring main units (RMU), as the major device for protection and segment isolation to ground cabled distribution network, are widely used in urban power grids, due to its safe and reliable performance, compact and superior cost-effectiveness. Energypac Engineering Ltd as the leader in the field of distribution switchgear has been designing and manufacturing high-quality power distribution switchgear since 1982, with countless switchgear operating reliably over the country till now. Based on the design concept of full insulation and fully sealed, all primary parts within ERM RMU are fully sealed inside the stainless-steel main enclosure, protect too against condensation and external contaminated environment; the protection degree of the main tank body is up to IP67. Its modular unit, anticorrosion enclosure, and perfect tightness make them suitable for applications in various places.
- Rated current 630A and rated short-time withstand current 20kA for 3 seconds.
- Three-position disconnector/earthing switch downstream vacuum circuit breaker.
- Interlocking between vacuum circuit breaker & disconnector/earthing switch.
- Protection relay with ring core CTs on cable bushings.
- Yearly production capacity 100 units.
- Rated current 630A and rated short-time withstand current 20kA for 3 seconds.
- Three-position switch fuse disconnector with upstream earthing switch mechanically linked with a downstream earthing switch.
- Motor operation for load break switch.
- Yearly production capacity 100 units.
- Rated current 630A and rated short-time withstand current 20kA for 3 seconds.
- Three-position load break switch with disconnector and earthing switch.
- SF6 pressure indicator
- Motor operation for load break switch
- Capacitive voltage indication system
- Yearly production capacity 100 units.
ERM- RING MAIN UNIT
** This is only exemplary; specifications will vary based on individual client requirements
|
Model |
Description |
Width |
|
ERM-C |
Load break switch module without fuse |
325 mm |
|
ERM-F |
Load break switch module with fuse |
325 mm |
|
ERM-V |
Vacuum circuit breaker |
325 mm |
Name |
C Unit |
F Unit |
Circuit breaker V unit |
|
|
Rated voltage |
kV |
12 |
12 |
12 |
|
Rated frequency |
Hz |
50 |
50 |
50 |
|
1 min power frequency withstand voltage (phase to phase ,phase to earth/ on isolating distance |
kV |
42/48 |
42/48 |
42/48 |
|
Lightning impulse withstand voltage |
kV |
75 |
75 |
75 |
|
Rated current |
A |
630 |
≤125 (fuse rating |
630 |
|
Rated active load breaking current |
A |
630 |
|
630 |
|
Rated closed-circuit breaking current |
A |
630 |
|
630 |
|
5% active load breaking current |
A |
31.5 |
|
31.5 |
|
Rated cable charging breaking current |
A |
10 |
|
50 |
|
Rated transfer breaking current |
A |
|
1750 |
|
|
Rated short circuit breaking current |
kA |
|
(depending on fuse) |
25 |
|
Rated short circuit making current |
kA |
50 |
|
50 |
|
Rated short time withstand current |
kA |
20 for 3 sec |
||
|
Rated peak withstand current |
kA |
50 |
|
63 |
|
Mechanical endurance |
times |
5000 |
5000 |
10000 |
|
Ambient temperature |
℃ |
-20~+55℃ |
||
|
SF6 gas pressure |
MPa |
1.03 |
||
|
Protection class |
SF6 Gas tank = IP67, other =IP4X |
|||
|
SF6 tightness test (annual leakage rate) |
≤0.1% |
|||
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Fill out the form and we will get back to you shortly.
LOAD BREAK SWITCH (LBS)
Load Break switch is a common piece of equipment in an electrical substation to turn off and on the power to the transformer. It is used to isolate the substation from the distribution incoming line. Generally, a 12 kV load break switch is placed before a 12kV/415V transformer so that in case of a shutdown, it can be turned off and the main distribution line to other users does not interrupt. It is a mechanical switch protection system that is cheaper than a Vaccum circuit breaker. There are two types of LBS currently available in the international market. One is Air-insulated LBS, most of the LBS user clients in Bangladesh use this type of LBS . Air-insulated means the switching system is operated in a medium surrounded by air. Another one is gas-insulated LBS which is fairly new to this industry. In Gas Insulated LBS the switching operation is done in a closed chamber with a gas having high dielectric properties such as SF6 gas. Energypac Engineering is the biggest Local supplier of Air-insulated LBS in Bangladesh. But recently we have launched a new Gas Insulated LBS as well.
- Robust design
- Mechanical & Electrical Operation
- Maintenance-free mechanism
- Separate HT / LT Compartments
- Compact design with aesthetic look
- Yearly production capacity 250 units
- Trouble-free mechanism
- Available in both Indoor/Outdoor version and extensible
- Manual operation with HRC fuse protection
- No arc chute hence minimal maintenance
- Compact design with aesthetic look
- Yearly production capacity 250 units
TECHNICAL SPECIFICATION OF SF6 LBS
** This is only exemplary; specifications will vary based on individual client requirements
|
Name |
Unit |
Rating |
|
Rated Voltage |
kV |
12 |
|
Rated Frequency |
Hz |
50 |
|
1 min power frequency Withstand Voltage (phase to phase ,phase to earth/ on isolating distance |
kV |
28 |
|
Lightning Impulse Withstand Voltage |
kV |
75 |
|
Rated Current |
A |
630 |
|
Fuse Rating |
A |
31.5/40/63 |
|
Mechanical Endurance |
times |
5000 |
|
SF6 gas pressure |
MPa |
0.075 |
|
Protection class |
SF6 Gas tank = IP67, other =IP4X |
|
|
SF6 Tightness Test (Annual Leakage rate) |
|
≤0.1% |
Send query
Fill out the form and we will get back to you shortly.
INDOOR VACUUM BREAKER
ENERGYPAC remains the first and only company in Bangladesh to introduce horizontal isolated, horizontal draw out type vacuum circuit breaker. The motivation of the top management together with the innovative skills of its R&D team made it possible for this circuit breaker to meet highly demanding needs for performance from all quarters including consultants, contractors, industries and utilities. Large numbers of this circuit breaker are in operation today in Bangladesh and other parts of the world. This 12 kV horizontal isolated, horizontal draw out vacuum circuit breaker type EHHV-12 is highly effective and easy to operate and maintain equipment for distribution at 12 W.
This specially designed equipment offers the following advantages:-
- User-friendly
- High degree of safety and operational reliability
- Rugged design, Simple in construction
- Modular and compact
- Easy maneuverability of the truck
- Extensible with high degree of customization
EHHV with Vacuum Circuit Breaker (12kV & 36kV)
EHHV-36 |
EHHV-12 |
TYPE |
|||
|
36kv |
12kV |
12kV |
12kV |
kv Ur Rated voltage |
|
|
170 |
75 |
75 |
75 |
Kv Up Rated lightning impulse withstands voltage |
Rated insulation level |
|
70 |
28 |
28 |
28 |
Kv Ud Rated power frequency withstand voltage |
|
|
50 |
50 |
50 |
50 |
Hz fr Rated frequency |
|
|
1250A 2000A |
630A 1250A 1600A 2000A 2500A 3150A |
630A 1250A 1600A 2000A 2500A 3150A |
630A 1250A 1600A 2000A |
A 𝐼k Outgoing feeder Rated (normal) Current |
|
|
80 |
100 |
80 |
62.5 |
KA 𝐼p (50/60 Hz) Rated peak withstand current, equal to rated short-circuit making current |
|
|
31.5 |
40 |
31.5 |
40 |
KA Ik tk = 3 s Rated short-time current |
|
|
31.5 |
40 |
31.5 |
40 |
KA 𝐼sc Rated short-circuit breaking current |
|
|
33% |
33% |
33% |
33% |
% Percentage value of the DC component |
|
|
31.5 KA |
40kA |
31.5 KA |
25 kA |
KA Id Rated breaking current under asynchronous conditions |
|
|
≤10,000 |
≤10,000 |
≤10,000 |
≤10,000 |
With rated (normal) current |
Number of operating cycles without overhaul |
|
≤100 |
≤100 |
≤100 |
≤100 |
With rated short-circuit breaking current |
|
|
<50 |
<45 |
<45 |
<45 |
ms Opening time (man) |
Operating times with release |
|
<80 |
<55 |
<55 |
<55 |
ms Closing time (max.) |
|
|
15ms |
15ms |
15ms |
15ms |
ms Arc duration (max.) |
|
|
<15 |
<12 |
<12 |
<12 |
s Charging time for circuit-breaker |
|
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