Under-frequency protection relays

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13 companies | 23 products
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phase sequence protection relay
phase sequence protection relay
SIU-C

Trigger voltage: 24 V - 230 V

SIU-C GRID INTERCONNECTION The SIU-C represents the best and most precise protection solution for transformers and electrical machines in high, medium, and low-voltage distribution systems. The SIU-C is a voltage and frequency protection ...

phase unbalance protection relay
phase unbalance protection relay
SIL-C

Trigger voltage: 24 V - 230 V

SIL-C FEEDER & GENERATOR PROTECTION RELAY High Accuracy and Reliability in a compact device The SIL-C Relay protects Feeders and Equipment and includes comprehensive current, voltage, and frequency protection for a compact device's ...

grid and system protection relay
grid and system protection relay
NA003-M64

Trigger voltage: 24, 110 V

Grid protection monitoring relay RE series; Frequency and voltage monitoring; Grid and system protection; Functionally Safe; Measuring voltage 3 x 400/230V AC; Supply voltage 24V DC, 110-240V AC; 3 CO contacts; Width 107 mm; Installation ...

grid and system protection relay
grid and system protection relay
NA003.COM-64

Trigger voltage: 24 V - 110 V

Grid and system protection monitoring relay RE series; Frequency and voltage monitoring; Functional safety; Measuring voltage 3 x 400/230V AC; Supply voltage 24V DC, 110-240V AC; 3 CO contacts; Width 107 mm; Installation design GRID ...

over-voltage protection relay
over-voltage protection relay
900VPR-BL-U-CE

Tripping current: 3, 5 A
Trigger voltage: 50 V - 500 V

• 3 phase RMS voltage protection relay • Monitors: Over / Under Voltage, Over / Under Frequency, Phase asymmetry, Phase failure, Phase sequence & Neutral loss • Accuracy: ± 1% of Voltage, ± 0.3Hz • Measuring range : 160 to 520V depending ...

over-voltage protection relay
over-voltage protection relay
SIPROTEC 7UM62

The SIPROTEC 7UM62 protection relays can do more than just protect. They also offer numerous additional functions. Be it earth faults, short-circuits, overloads, overvoltage, overfrequency or underfrequency asynchronous conditions, protection ...

temperature protection relay
temperature protection relay
FPC 200

Tripping current: 0.3 A - 30 A

FPC 200 is a family of current or voltage digital protection relays with easy to use interface meant for variety of solutions in industry and power distribution. Its robust design enables it to be placed in demanding industrial environments ...

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Iskra d.d.
over-voltage protection relay
over-voltage protection relay
SEL-787-3E/-3S/-4X

Transformer Protection Relay Protect and monitor most three- and four-winding transformers and terminals with the versatile SEL-787 Transformer Protection Relay platform. Select SEL-787-3E/-3S models, and apply three-phase current and ...

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Schweitzer Engineering Laboratories
under-frequency protection relay
under-frequency protection relay
PHD series

Trigger voltage: 87 V - 550 V

The Frequency protector set point adjustment range is centred around the nominal system frequency of 50, 60 or 400Hz. The adjustable differential setting can be used to reduce nuisance tripping if the measured signal is noisy or unstable. ...

over-voltage protection relay
over-voltage protection relay
PCS-985TI

PCS-985TI is a high performance numerical transformer protection device, which integrates main and backup protection into one device. It provides complete protection of a transformer in any voltage level, and is typically applied for ...

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NR Electric
over-current protection relay
over-current protection relay
VIPAM3500

Tripping current: 5 A
Trigger voltage: 110 V

VIPAM3500 (Integrated Electronic Device) is a digital protection relay that enables a high-precision measurement and protection relay for switchgear power equipments. The switchgear panel became compact by connecting various protection ...

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VitzroEM Co., Ltd.
over-voltage protection relay
over-voltage protection relay
T-PRO series

The IEC 61850 station bus embedded T-PRO relay provides complete 3-phase multi-winding transformer fault and overload protection, DFR-quality fault oscillography, sequence of event logging, trend recording, in a fully integrated protective ...

over-voltage protection relay
over-voltage protection relay
KPFV51x series

Trigger voltage: 100 V - 480 V

KPFV51x - SINGLE PHASE - FREQUENCY AND VOLTAGE GUARD Under and Over Voltage and Frequency Protection Adjustable Voltage and Frequency Deviation Set points "Pathfinder" function Optional very fast analogue output (<50mS), ...

over-voltage protection relay
over-voltage protection relay
XMR-P

XMR-P is a part of XMORE platform, the complete range of IEDs for Medium Voltage application including feeder, motor, generator, transformer and capacitor bank; it is the multifunction and comprehensive Feeder, Transformer, Motor and ...

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THYTRONIC
over-frequency protection relay
over-frequency protection relay
MP 250

MP250 continuously monitors the mains parameters, in order to interrupt the parallel between the generators and the mains in case some parameters are of out of limits. The digital outputs of the relay can be used to issue an opening ...

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