GE Vernova MVAW 11/13/21 type intermediate relay

GE Vernova MVAW 11/13/21 type intermediate relay

Overall positioning and core design of the product

Product ownership and use: MVAW 11/13/21 is an intermediate relay from Grid Solutions, a subsidiary of GE Vernova. Its core function is to remotely control switchgear and related supporting equipment through long guide wires. It can be adapted to corrosion-resistant negative potential bias devices and is widely used in power systems and industrial remote control scenarios.

Core structural design: Adopting a compact structure with a suction armature, it has high mechanical stability and reliable action; The integrated tubular plug in the coil component is the core design of the relay that does not respond to induced AC voltage, effectively avoiding misoperation caused by AC interference.

Model core difference: The core difference among the three models is the contact reset method, with MVAW 11/21 being a self reset contact and MVAW 13 being a manual reset contact; MVAW11/13 is a single pole relay, MVAW21 is a double pole relay, and a mechanical manual reset action indicator can be optionally installed to facilitate on-site inspection of the relay's working status.

Contact action principle: All models of contacts follow the mechanical action principle of "short terminals break first" to ensure the safety and stability of contact switching.

Core electrical technical parameters

The core electrical parameters of the product are designed around DC operation, with outstanding resistance to AC interference. The key values are shown in the following table and core instructions:

Notes on Core Indicators of Electrical Parameters

Rated voltage 30/34V, 48/54V, 110/125V, 220/250V DC full series DC rated voltage, suitable for different on-site power supplies

The typical range of AC suppression is up to 110V AC 50Hz (48/54V relay). Depending on the contact configuration, the AC suppression capability is divided into two levels: 70V/110V

The maximum guiding circuit resistance of 200 Ω is suitable for the resistance characteristics of long guiding wires

The core characteristic of high pull in current ≥ 25mA is suitable for corrosion-resistant negative potential bias devices

Release current ≥ 15mA-

48/54V relay power consumption 3.7W (at 54V)-

Typical action time of 50ms (4-contact configuration, 48V, 0/200 Ω circuit) varies slightly with the number of contact points

Reset time<35ms, typical value is about 80ms

Contact durability with load capacity: ≥ 10000 times; No load: ≥ 100000 times to ensure long-term stable operation

Contact configuration and rated parameters

Contact type and combination

Divided into standard contacts and heavy-duty arc extinguishing contacts (Blow out Contacts), the contact action is defined as: closing (M), disconnecting (B), and arc extinguishing (Z/Y);

Multiple contact combinations are provided, including 4M, 3M1B, 2M2B, 2M2Z, 2B2Z, etc. The MVAW21 (bipolar) is also divided into left-hand and right-hand units, each supporting independent contact combinations to meet diverse control needs.

Correlation between communication inhibition ability and contact configuration

Different contact combinations correspond to different 50Hz AC suppression capabilities, providing a basis for on-site anti-interference selection:

Contact combination AC suppression capability (50Hz AC) Contact combination AC suppression capability (50Hz AC)

4M (4 closed) 110V 2M2B (2 closed and 2 open) 70V

2M2Z (2 closed, 2 arc extinguishing) 110V 2B2Z (2 broken, 2 arc extinguishing) 70V

3M1B (3 closed and 1 disconnected) 70V 2M2Y (2 closed and 2 arc extinguishing) 70V

Rated capacity of contacts

The on/off and load-bearing capacity of standard/conversion contacts and heavy-duty contacts are different, and the indicators are distinguished under AC/DC working conditions. The core is shown in the table below:

Contact type, working condition, continuous closing load, 3-second closing load, breaking capacity

Standard/Conversion Contact AC 1250VA (≤ 5A/300V) 7500VA (≤ 30A/300V) 1250VA (≤ 5A/300V)

Standard/Conversion Contact DC 1250W (≤ 5A/300V) 7500W (≤ 30A/300V) Resistive 100W/Inductive 50W (≤ 5A/300V)

Heavy duty contact DC 1250W (≤ 5A/300V) 7500W (≤ 30A/300V) reference product curve

Electrical endurance and compliance certification

The product has excellent electrical tolerance and complies with EU EMC and product safety related directives, providing assurance for safe operation on industrial sites

Dielectric endurance (compliant with IEC 60255-5:1977)

Between all terminals and the shell ground: 2kV rms, lasting for 1 minute;

Between all terminals of an independent circuit: 2kV rms, lasting for 1 minute;

Both ends of the normally open contact: 1kV rms, lasting for 1 minute.

High voltage impulse withstand (compliant with IEC 60255-5:1977)

Apply 3 positive pulses and 3 negative pulses to all terminals of the same circuit (excluding output contacts) and independent circuits, as well as between all terminals and the shell ground: 5kV peak (1.2/50ms, 0.5J).

High frequency interference tolerance (compliant with IEC 60255-22-1:1988 Class III)

Between independent circuits and between independent circuits and the shell ground: 2.5kV peak;

Between the same circuit terminals (excluding metal contacts): 1.0kV peak.

Compliance Certification

EMC compliance: Compliant with Directive 89/336/EEC, certified according to the general standard EN 50081-2:1994/1995;

Product safety: Compliant with the 73/23/EEC EU Low Voltage Directive and certified according to EN61010-1:1993/A2:1995.

Mechanical and Environmental Characteristics

Shell and Protection

Shell specifications: MVAW11/13 (single pole) adopts shell 2, MVAW21 (double pole) adopts shell 4;

Protection level: IP50 (dust protection), in compliance with IEC 60529:1989 standard.

Temperature tolerance (in accordance with IEC 60255-6:1998)

Working temperature: -25 ℃~+55 ℃;

Storage/transportation temperature: -25 ℃~+70 ℃, withstand dry heat (IEC 60068-2-2:1974) and low temperature (IEC 60068-2-1:1990) working conditions.

Humidity tolerance: Complies with IEC 60068-2-3:1969 standard, can work continuously for 56 days in an environment with 93% relative humidity and 40 ℃, without condensation effect.

Mechanical vibration: Complies with IEC 60255-21-1:1988 standard, response level 1, excellent anti vibration ability, suitable for complex mechanical environments in industrial sites.

Ordering and Additional Information

Essential information for ordering: When placing an order, it is necessary to clearly provide the relay model (11/13/21), rated voltage, contact type/combination, and whether optional action indicators are required;

Additional note: The breaking capacity of heavy-duty arc extinguishing contacts does not have a fixed value, and reference should be made to the breaking capacity curve in the product manual; Detailed wiring and installation information of the product can be found in the corresponding product manual.