Three-phase monitoring relays

Do you need help making a decision?  Take a look at our buying guide
34 companies | 80 products
exhibit your products

& reach your clients in one place, all year round

Exhibit with us
Search
Three-phase monitoring relays | Choosing the Right Protection Relay
Protection relays have different functions. They are often made up of several modules, each of which performs a specific function. In this guide, we will distinguish three types of functions: protection against abnormal variations in the main supply, protection against leakage currents, and protection against overloads. Protection against abnormal grid variations Abnormal voltage, current, and frequency variations can lead to problematic phenomena. These...
{{#pushedProductsPlacement4.length}} {{#each pushedProductsPlacement4}}
{{product.productLabel}}

{{product.productLabel}} {{product.model}}

{{#if product.featureValues}}
{{#each product.featureValues}} {{content}} {{/each}}
{{/if}}
{{#if product.productPrice }} {{#if product.productPrice.price }}

{{product.productPrice.formattedPrice}} {{#if product.productPrice.priceType === "PRICE_RANGE" }} - {{product.productPrice.formattedPriceMax}} {{/if}}
{{/if}} {{/if}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}} {{#each product.productTagAssociationList}}
{{/each}}
{{/each}} {{/pushedProductsPlacement4.length}}
{{#pushedProductsPlacement5.length}} {{#each pushedProductsPlacement5}}
{{product.productLabel}}

{{product.productLabel}} {{product.model}}

{{#if product.featureValues}}
{{#each product.featureValues}} {{content}} {{/each}}
{{/if}}
{{#if product.productPrice }} {{#if product.productPrice.price }}

{{product.productPrice.formattedPrice}} {{#if product.productPrice.priceType === "PRICE_RANGE" }} - {{product.productPrice.formattedPriceMax}} {{/if}}
{{/if}} {{/if}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}} {{#each product.productTagAssociationList}}
{{/each}}
{{/each}} {{/pushedProductsPlacement5.length}}
current monitoring relay
current monitoring relay
70 series

Tripping current: 6, 10, 30 A

... that allow monitoring of undervoltage and overvoltage, phase sequence and phase failure. Features include (according to Type): • Multifunctional types, providing the flexibility of monitoring ...

frequency monitoring relay
frequency monitoring relay
LINETRAXX® VMD420

... Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V Various monitoring functions selectable U, f Asymmetry, phase failure and phase sequence monitoring Adjustable ...

See the other products
BENDER GmbH & Co KG
frequency monitoring relay
frequency monitoring relay
LINETRAXX® VMD421H

... overvoltage and frequency monitoring in 3(N)AC systems 0…500 V Integrated energy backup Asymmetry, phase failure and phase sequence monitoring Adjustable start-up delay, response delay ...

See the other products
BENDER GmbH & Co KG
frequency monitoring relay
frequency monitoring relay
LINETRAXX® VMD423/VMD423H

... period, will cause the alarm relay to switch. The voltages are measured as r.m.s. values. In addition asymmetry, phase failure and phase sequence are monitored. The VMD423 is suitable for multifunctional ...

See the other products
BENDER GmbH & Co KG
voltage monitoring relay
voltage monitoring relay
S3UM

Trigger voltage: 24 V

... Voltage monitoring relay, to monitor overvoltage and undervoltage values, and the phase sequence in 3- phase supplies, 40 -400 Hz, measuring voltage 400/440 V AC, width 22.5 mm, UB = 24 ...

overload monitoring relay
overload monitoring relay
777 series

... a fast linear trip is required. All of the overload relays provide unsurpassed protection by combining overload, voltage, phase loss and reversal, voltage and current unbalance, power monitoring, and ...

See the other products
Littelfuse
power monitoring relay
power monitoring relay
REC615

... REC615 is a remote monitoring and control relay, RER615 is a recloser protection and control relay These grid automation relays are designed for remote control and monitoring, ...

See the other products
ABB Oy Distribution Automation
phase monitoring relay
phase monitoring relay
RPW

... Monofunctionalmodels RPW-SF: Phase sequence relay RPW-FF: Phase loss relay RPW-FSF: Phase sequence and loss relays Multifunctional models ERWT-VM1 ...

over-current monitoring relay
over-current monitoring relay
SEL-487E

... Protection Relay Protect and monitor most transformer applications with the powerful SEL-487E Transformer Protection Relay. Apply up to 5 three- phase restraint inputs, three ...

multifunction monitoring relay
multifunction monitoring relay
VARIMETER PRO | UG 9400

... separated Modbus RTU interface • Voltage monitoring (1- or 3- phase) • Current monitoring • Frequency monitoring • Power factor cos phi • Phase sequence, phase ...

See the other products
DOLD
multifunction monitoring relay
multifunction monitoring relay
VARIMETER PRO | MK 9300N

... Features • Multifunction measuring relay acc. to EN 60255-1 • Voltage monitoring (1- and 3- phase) • Current monitoring • Frequency monitoring • Power factor cos ...

See the other products
DOLD
voltage monitoring relay
voltage monitoring relay
RP 9811

Trigger voltage: 400, 230 V

... frequency monitor RP 9811 of the VARIMETER NA family DOLD offers a safe and standard-conforming solution for optimal mains monitoring of the energy feed to the public grid. User-friendly: The unit can be adjusted quickly and simply with ...

See the other products
DOLD
earth-leakage monitoring relay
earth-leakage monitoring relay
RGU-10B

... control input. - Assembly on DIN rail 46277 (EN-50022). - 3 modules Applications Monitoring of the electrical insulation in: single or three- phase AC installations, AC installations ...

power monitoring relay
power monitoring relay
PQRM5100 31 series

Tripping current: 4 A

... power and power factor per each phase • +active energy, -active energy, inductive energy, capacitive energy per each phase and per 3 phase • frequency, phase angle, ...

over-voltage monitoring relay
over-voltage monitoring relay
CRV1-37

Trigger voltage: 300 V - 500 V

... The CRV1-37 relay switches when the voltage of one of the phases exceeds the minimum or maximum thresholds, in case of asymmetry or phase inversion: - Electrical: CRV1-37: for three- phase ...

earth-leakage monitoring relay
earth-leakage monitoring relay
ELR-4MA

... The ELR-4MA AC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical systems. With a residual current transformer (RCT), it continuously monitors the residual current in the ...

temperature monitoring relay
temperature monitoring relay
250 V | TC70

Tripping current: 1, 3 A
Trigger voltage: 250 V

... is a specialized device for monitoring and protection of 3- phase asynchronous motors, designed for DIN-rail mounting. It monitors phase presence and order, phase line voltage, and zero ...

voltage monitoring relay
voltage monitoring relay
PMV series

Trigger voltage: 208 V - 600 V

... Voltage monitoring realy for three- phase system, without neutral, phase loss and incorrect phase sequence, 208...480VAC 50/60Hz • ype of product: Voltage monitoring ...

voltage monitoring relay
voltage monitoring relay
DPA01CM44

Trigger voltage: 208 V - 480 V

... 3- Phase Delta Monitoring Relay, Sequence and Phase Loss, 2 SPDT Relay Outputs, IP20, DIN-rail mounting, Measuring Range 177 to 550Vac, 22.5x83.5x99.5mm housing Specifications Mounting Industrial ...

See the other products
CARLO GAVAZZI
power monitoring relay
power monitoring relay
Beep

... Power relay, single- phase network 2 Module Non-priority load tripping management Relay output for load tripping or external sound signaling (selectable) Inner alarm Buzzer Measuring range: 0...6.5 ...

under-voltage monitoring relay
under-voltage monitoring relay
G2PU690VS20

Trigger voltage: 690 V

... GAMMA Series Phase Loss Monitor for up to 690V nominal voltage This product monitors phase loss, phase sequence, and phase rotation. The under-voltage settings can be adjusted locally ...

See the other products
TELE Haase Steuergeraete GmbH
phase unbalance monitoring relay
phase unbalance monitoring relay
85 - 500 V | 158 series

... sensing circuit, driving an electro-mechanical relay. When correct voltage and phase rotation are applied, the internal relay will energize. A fault condition will de-energize the relay. ...

See the other products
Time Mark
current monitoring relay
current monitoring relay
EVAR

... The Electrical Variable Analyzer Relay (EVAR) has been designed to continuous monitoring of a single or three- phase system. It provides metering for current, voltage, real power, reactive ...

voltage monitoring relay
voltage monitoring relay
HRN-43 series

Tripping current: 16 A

... Monitoring voltage relay, 3- phase HRN-43, HRN-43N galvanically separated supply AC 230V, AC 400 or AC/DC 24V, memory, adjustable hysteresis and delay, 2 x independent output monitoring ...

See the other products
ELKO
under-voltage monitoring relay
under-voltage monitoring relay
PPR10

... Monitoring of all static 3- phase parameters: Over / Undervoltage, Sequence, Asymmetry, Frequency. Monitoring of dynamic parameters: df/dt (ROCOF) and Phase angle fault. Programmable ...

See the other products
COMADAN
voltage monitoring relay
voltage monitoring relay
RPN series

Tripping current: 12 A
Trigger voltage: 300 V

... Multifunctions monitoring relays - AC voltage monitoring in 3- phase network 3(N)~400/230 V. Type of contacts: 1 CO, 2 CO Technical info Output circuit - contact data: Number and ...

See the other products
RELPOL
current monitoring relay
current monitoring relay
BMRCD01

Tripping current: 5 A
Trigger voltage: 30, 230 V

The BMRCD-01 modular residual current device can be installed with MCCB and MCB in addition to shunt/under-voltage release for residual current protection. BMRCD-01 consists of a controlling module and detecting modules (only B-type detecting modules ...

under-voltage monitoring relay
under-voltage monitoring relay
EUW 3

Tripping current: 0.2, 4 A
Trigger voltage: 195 V - 253 V

... The EUW 3 supervises three- phase networks on under and overvoltage, in which both switching points can be independently adjusted by each other. Overranging has to be avoided. The supervision is separately carried out ...

See the other products
Elektra Elektronik GmbH & Co. Störcontroller KG
phase sequence monitoring relay
phase sequence monitoring relay
GZ90

... sequence of a threephase power line. If one or more phases disappear, the relay turns off. It is available in two versions: • F 22. The relay turns ON only if the sequence is wrong. • F 33. The relay ...

See the other products
ELETTROMECCANICA CDC s.r.l.
exhibit your products

& reach your clients in one place, all year round

Exhibit with us
DirectIndustry RFQ: Free quotation comparison tool
Receive and compare quotations for free
Describe your project
We select
the best suppliers
Compare quotations and complete your purchase