ESS

Battery energy storage systems (BESS)

Battery energy storage systems (BESS) are used to store power (often from a renewable source) for later use during a critical time. The benefits of these systems include cost savings, clean energy, and reducing downtime. It is vital that the electrical integrity of the systems is properly monitored to maintain the benefits.

Unearthed BESS

BESS most commonly operate as unearthed systems, which means all line conductors are intentionally isolated from earth. Although these systems can continue to operate with a single earth fault, it is vital to indicate and clear the first fault as quickly as possible. If the fault is not cleared, a second fault develops and a line-to-line short will occur. Bender’s insulation monitoring devices (IMDs) will give advanced notice of a first fault condition which allows for time to properly identify and clear the fault before a catastrophic issue arises. Bender offers a wide range of IMDs for virtually all size BESS, from small-scale deployments to commercial and industrial systems to large-scale, utility grade systems.

Earthed BESS

Most BESS operate via an unearthed system design, however there are earthed installations that must have proper earth fault protection to operate safely. These systems can be earthed at the + or – pole of the DC (battery) circuit, or at the neutral connection point on the inverter. It is essential to detect gradual insulation deterioration or earth faults by means of residual currents. This allows issues to be detected and cleared at an early stage, before they trip a protection device and/or damage the batteries. Bender’s residual current monitors are able to detect low-level AC and DC earth faults to indicate minor issues before they become major issues, such as equipment fires or system shutdowns.

Benefits

Minimising system downtime
Electrical issues can be detected and located while keeping the installation fully energised.

Increased safety
Earth-fault location at packs and modules minimises battery fire risk (with quick repair).

Automatic fault location
Automatic fault location provides remote diagnostic tools which eliminates the need to have technicians on site in the event of a fault.

Reduction of maintenance costs
Significant decrease in maintenance costs due to the accuracy of detection and decreased need for human interaction with the system.

Downloads

CategoryNameSizeLanguageTimestampD-/B-Number
Technical article Insulation Fault Location - Planning and Setup 112.4 KB EN2019/05/13 10:29:2213.05.2019 10:29:22
Technical article Electrical Safety in Control and Auxiliary Circuits 632.6 KB EN2019/05/13 10:29:2213.05.2019 10:29:22

Products

Insulation monitoring

ISOMETER® isoPV425 mit AGH420
ISOMETER® isoPV425 with AGH420

Insulation monitoring device for photovoltaic systems up to AC 690 V/DC 1000 V

ISOMETER® iso685…
ISOMETER® iso685…

Insulation monitoring device for inverter applications and large industrial plants

ISOMETER® isoPV1685/isoPV1685PFR
ISOMETER® isoPV1685RTU/isoPV1685P

Insulation monitoring device for unearthed systems in photovoltaic installations up to AC 1000 V/DC 1500 V

Residual current monitoring

LINETRAXX® SmartDetect RCMS410

Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems

LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Insulation fault location

ISOSCAN® EDS440
ISOSCAN® EDS440

Insulation fault locator for localisation of insulation faults in main circuits

Insulation monitoring

ISOMETER® isoPV425 mit AGH420
ISOMETER® isoPV425 with AGH420

Insulation monitoring device for photovoltaic systems up to AC 690 V/DC 1000 V

Details
ISOMETER® iso685…
ISOMETER® iso685…

Insulation monitoring device for inverter applications and large industrial plants

Details
ISOMETER® isoPV1685/isoPV1685PFR
ISOMETER® isoPV1685RTU/isoPV1685P

Insulation monitoring device for unearthed systems in photovoltaic installations up to AC 1000 V/DC 1500 V

Details

Residual current monitoring

LINETRAXX® SmartDetect RCMS410

Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems

Details
LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

Details
LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Details

Insulation fault location

ISOSCAN® EDS440
ISOSCAN® EDS440

Insulation fault locator for localisation of insulation faults in main circuits

Details

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