DC Switchgear

SafeBond

The BRUSH Switchgear SafeBond integrates the feeder circuit breaker function and the remote bonding function into one standard Lightning panel footprint, a big advantage in floor space saving, civil engineering, cabling and operational consistency and safety.

Overview

SafeBond incorporates the NDC high speed, unidirectional circuit breaker, featuring the award-winning magnetic actuator, to carry out the making and breaking of all load and fault currents, whilst an “off-load” motorised two position disconnector selects the circuit.

With the disconnector in the positive position and the NDC circuit breaker closed, the positive busbar is connected to the track feeder cable thereby functioning as a standard feeder circuit breaker. 

Key benefits

Asset Life Extension
Custom Engineered Solutions
Lower Total Cost of Ownership (TCO)
Proven Design
ENGINEERING FOCUS

NDC Circuit Breaker at the Heart of Safebond

The patented arc transfer system prevents internal contamination of the circuit breaker compartment and cubicle.

The Cold Cathode Arc Chute Assembly dissipates all arcs whilst the transfer coil provides additional magnetic flux across the contact gap, assisting with the interruption of low currents that would otherwise lead to long arcing times.

The Magnetic Actuator is based on a solenoid plunger, and provides the motion required to close the main contacts and to reset the latch device on tripping.

Technical Specifications

PropertyRating
Nominal Voltage750-1500V dc
Rated Voltage900-1800V dc
Rated Insulation Voltage1800-3000kV
Power-Frequency Withstand Level9 kV (ac)
Rated Impulse Withstand Level20 kV (ac)
Rated Short-Time Withstand Current100kAp / 71kA 250ms
Rated Short-Circuit Current180kAP/125kA – 142kAP/100kA
Auxiliary Operating Supply48 / 110 / 220V dc
Specified Service Life30 Years
StandardsBS EN 50123
Environmental ConditionsAs EN 50123-1 clause 4.1, normal
Max and Min Operating Temperature40 / -5 Deg C
Degree of PollutionEN50124-1 PD4

Key Features

Enhanced Functionality
Feeder circuit breaker and bonding functions integral to one panel
Ease of Operation
Proven ‘off-load’ 2 position disconnector selects the circuit
Improved Operator Safety
Electrical control/interlocking schemes to suit customer requirements
Ease of Installation
No additional civil engineering/cabling or outdoor housing costs
Automation Ready
SCADA Remote control of complete unit as standard

Switchgear Services

From initial system analysis, to design, engineering, supply, installation, commissioning and upgrades of equipment through to repurposing or decommissioning. We provide lifecycle management and support.

CONTACT US

Speak to Our Team

BRUSH has a global reputation for service excellence and dedicated customer support. Whether it’s the provision of parts or the delivery of service support in the field, at the customer’s premises or at our network of Service Workshops.

With a wealth of experience and knowledge expanding over more than 145 years, the capabilities of BRUSH are endless and service unrivalled, with engineers stationed worldwide and spare parts ready 24/7/365, it is a truly global organisation.