Master Break Load Interrupter Switch
Available as a standard switch (2.4–15 kV, up to 600 A) or with the VD4 Evolution vacuum circuit breaker (200–800 A, 42 circuits)
Spike Electric’s Master Break Medium Voltage Load Interrupter Switchgear is at the forefront of electrical technology, designed for exceptional safety and motor control efficiency. This innovative switchgear solution is meticulously engineered to meet the most stringent industry standards, ensuring consistent performance and robust protection across a wide range of industrial settings.
The Master Break Load Interrupter Switchgear by Spike Electric Controls is an ANSI-certified switch ideal for handling medium voltage circuits ranging from 2.4 kV to 15 kV. It is capable of managing up to 600 amperes, making it versatile for various applications, including connecting or disconnecting transformers. Its flexible design supports different distribution needs such as single-circuit transformer control, duplex switching, and selector switch applications. This versatility makes it popular across multiple industries, including oil and gas, pulp and paper, automotive, industrial processes, wastewater treatment, petrochemical, and utilities. Spike Electric Controls Master Break LIS provides reduced Arc Flash incident energy levels for customers on their existing MV equipment. Operating in three cycles, the fast-acting SecoVac VCB adds an Arc Flash mitigating solution designed in response to Arc Flash Safety Standards.
Specifications at a Glance
|
Voltage range |
2.4 kV – 15 kV |
2.4 kV – 15 kV (switch); VD4 Evo breaker component rated 17.5 kV |
|
Current rating |
Up to 600 A |
200 A – 800 A |
|
Circuits |
Not stated on source page |
42 circuits |
|
Compliance |
ANSI-certified |
UL / NEMA |
|
Breaker |
Fast-acting 3-cycle SecoVac VCB referenced in feature copy (no dedicated breaker section) |
Fixed-mount VD4 Evo VCB — embedded-pole (APG resin), 3-phase AC indoor, 3-cycle fast-acting |
|
Relay |
Not stated on source page |
SEL-751 feeder protection relay, or other specified relay |
|
Reference doc(s) |
Spec Sheet: Master Break LIS Med Voltage Interrupter (04.24 PDF) |
Need Help Selecting the Right Load Interrupter Switch?
Spike engineers can help define the voltage class, current rating, protection method, enclosure, lineup arrangement, and qualification path for your project.
Configurations
- Master Break Load Interrupter Switch (Standard)
- Master Break Load Interrupter Switch w/ VD4 Evo Breaker
- ANSI-certified, 2.4 kV – 15 kV, up to 600 A
- Applications: transformer connect/disconnect, single-circuit transformer control, duplex switching, selector switch arrangements
- References a fast-acting, 3-cycle SecoVac VCB in the general feature copy (this page does not have the dedicated VD4 Evo breaker section — see Tab 2 for the breaker-equipped configuration)
VD4 Evo Breaker for Quality Protection
VD4 Evo circuit breaker is a three-phase AC indoor breaker with 17.5 kV rated voltage. It is used for control and protection of electrical equipment in industrial and mineral enterprises, power plants, and substations. Durable and reliable, the VD4 Evo breaker is especially suited for conditions that require frequent operation.
The VD4 Evo series MV embedded-pole vacuum circuit breaker (VCB) uses Automatic Pressure Gelatin (APG) technology to embed the vacuum interrupter and connection terminals within epoxy resin, simplifying pole assembly, improving assembly accuracy, and improving environmental resistance (dust, humidity, vermin, pollution, high altitude).
This solution includes a fixed-mount VD4 Evo vacuum circuit breaker (VCB) in the fused compartment of the LIS. Operating in three cycles, the fast-acting VCB adds an Arc Flash mitigating solution designed in response to Arc Flash Safety Standards.
Breaker Mechanism
All the mechanical parts of the mechanism are integrated into opening and closing modules individually. The closing and opening modules are universal to the entire series of VB2 Plus embedded-pole vacuum circuit breakers, reducing the likelihood of mechanical readjustment and lowering operation and maintenance costs.
Differential Relay Options
The Master Break LIS includes all major components: the Load Interrupter Switch, VD4 Evo vacuum circuit breaker, and the choice of a SEL-751 feeder protection relay or other specified relay.
- Basic mechanical kinematic chain anomalies detection
- Accessories monitoring and replacement suggestions
- Loose connections detection and CB contacts monitoring
- Predict CB mechanical failures
- Advanced thermal checks & VI life
- Advanced mechanical chain and travel curve monitor
Key Features of the Master Break LIS
- Feeder Protection
- LEA Sensor Inputs
- Expanded Arc-Flash Solutions
- Sensitive Earth Fault (SEF) Protection
- High-Impedance Fault Detection
- Islanding Protection
- Cold-Load Pickup Element
- Incipient Cable Fault Detection
- Automation and Control
- Thermal Protection
- Event Analysis
- Reliable in Harsh Environments
- Open Conductors Detection
- Wildfire Risk Reduction
Flexible Communications
- IEC 61850 Edition 2
- RSTP
- EtherNet/IP
- IEEE 1588 Precision Time Protocol (PTP) (firmware-based)
- IEC 60870-5-103
- DNP3
- Modbus TCP/IP
- Telnet
- File Transfer Protocol (FTP)
- Simple Network Time Protocol (SNTP)
- Mirrored Bits communications
- ASCII
Standards & Approvals (confirmed on breaker page)
- American National Standards Institute (ANSI) — applicable sections of ANSI/IEEE C37.20.3, C37.20.4, C37.22, as existing and installed
- IEC-62271-200 Standard
- National Electrical Code (NEC)
Standard Featured & Accessories
Standard Features
- Copper silver-plated bus
- Full length ground bus
- Polyester coat paint
- ANSI 61 paint color (gray)
- Oversized viewing window
- Full height inter-phase barriers
- 11 gauge doors, barriers and covers
- Generous cable termination area
- Permanent non-corrosive nameplate
- Individual doors over switch and fuses
- Concealed door hinges
- Switch padlock provisions
- Key interlock provisions
- Split rear and side covers
- Tungsten-tipped arc interrupting blade
- Mechanical switch and door interlocking
- Louvered ventilation at top and bottom
- Safety horizontal barrier
Standard Outdoor Features
- Removable filters for louvers
- Long life space heaters
- 4″ channel base
- Sloped roof
- Bottom closure plates
- Rodent barriers
Optional Accessories & Features
- UL / cUL listing
- Copper tin-plated bus
- Insulated bus and bus boots over joints
- 80kA momentary bus rating
- Automatic transfer switch
- Weather resistant
- Dust resistant
- NEMA 2 drip-proof enclosure
- Rear doors (full height or double)
- Vertical barriers
- Seismic Zone 4 bracing
- Tamper resistant hardware
- Auxiliary switches (2NO-2NC)
- Thermostat
- Space heater (standard on outdoor, optional on indoor)
- Porcelain insulators
- Customer metering
- Surge arresters
- Mimic bus
- Space heater switch
- Ground studs
- Convenience light
- Duplex receptacle
- Top hat
- Run back bus
Built Here. Ready for Critical Power.
U.S.-based engineering and manufacturing for North American power systems.
Spike builds equipment around the project rather than forcing the project into a one-size-fits-all catalog. Domestic-content review and supporting documentation can be provided for qualifying configurations when required.
- U.S.-based engineering and manufacturing
- Faster technical decisions and clearer communication
- Strong control of quality, documentation, and change management
- Local startup, service, and lifecycle support
The Spike Advantage
- Responsive engineering decisions
- Practical application support
- Integrated manufacturing and testing
- Direct access to technical teams
- Direct access to technical teams