Schneider GV2P21 Motor Circuit Breaker

GV2P21

GV2: TeSys GV2 series motor circuit breaker

P: Rotary handle version (high-performance variant, distinct from push-button GV2ME; independent UL508 Type F certification, higher breaking capacity)

21: Current rating code → 17～23 A

Distinction Tip: GV2ME21 also covers 17–23 A, but adopts push-button operation; GV2P21 features a green rotary handle. Direct mechanical interchange is not allowed.

2. Core Electrical Parameters

3. Mechanical & Environmental Parameters

Overall dimensions: W45 mm × H89 mm × D97 mm

Mounting: Standard 35 mm DIN rail; alternatively fixed via M4 screws on panel

Protection degree: IP20 (finger-safe terminals)

Operating temperature: -25 ℃ ～ +60 ℃; Storage temperature: -40 ℃～+80 ℃

Mechanical endurance: ≥100,000 operations; Electrical endurance AC-3 ≥100,000 operations

Features: Built-in phase loss protection; integrated TEST button; padlockable in OFF position; clear tripping status indication

4. Terminal Definition

Line side (power input): 1L1, 3L2, 5L3

Load side (motor output): 2T1, 4T2, 6T3

5. Optional Accessories (Ordered Separately)
6. Auxiliary contact blocks: GV2AN11 (1NO+1NC), GV2AN20 / GV2AN02
7. Fault signal contact: GV2AD10 (trip-specific contact, distinguishes overload and short-circuit tripping)
8. Undervoltage release GV2AU, Shunt trip release GV2AS
9. Busbar connectors, terminal shrouds, external extended rotary handle
10. Selection & Replacement Solutions

✅ Direct same-series replacement

GV2P21 (rotary handle, 17～23A); Do not mistakenly adopt GV2ME21 (push-button variant with different mechanism)

⚠️ Cross-series upgrade alternative

TeSys GV3P25 (overlapping current range, larger overall size; cabinet installation space must be verified)

7. Selection Pitfall Guidelines
8. The adjustment dial must be set to the motor rated full-load current (FLC); avoid long-term operation near the upper limit;
9. Class 10 trip characteristic: standard motor startup protection; use cautiously for heavy-duty frequent startup conditions;
10. GV2P integrates overload and short-circuit protection. Fuses at upstream can be omitted for single small motors. Upstream short-circuit protection coordination is required for high-power systems;
11. Vertical installation is mandatory; reserve heat dissipation space around devices. Avoid overheating and false tripping caused by dense side-by-side mounting;
12. Built-in phase loss protection, recommended for 3-phase motors; direct application for single-phase motors is not advised.
13. Typical Application Scenarios

3-phase asynchronous motors (rated current 17～23A) such as water pumps, fans, conveyors, small air compressors and machine tool motors; control cabinets for automated production lines, HVAC and packaging machinery.

Full Comparison: GV2ME21 VS GV2P21

Common features: 17～23 A adjustment range, 3P thermal-magnetic trip, Class 10, phase loss protection, identical terminal layout, DIN rail mounting, interchangeable auxiliary contacts (GV2AN11/GV2AD10); overload & short-circuit protection thresholds are exactly the same.

1. Core Comparison Table

2. Detailed Interpretation

2.1 Operation Mode & Safety Logic (Most Intuitive Difference)

GV2ME21: Push-button Start/Stop

Press black START to close; press red STOP to open.

After motor overload/short-circuit trip, red button pops out. Circuit can be reset directly by pressing the red STOP button.

✅ Suitable for: Local operation inside control cabinets, general fans & water pumps, standard domestic automation equipment.

GV2P21: Rotary Handle Operation

Rotate clockwise → ON (closed); Rotate counterclockwise → OFF (open).

Upon fault tripping, handle locks at intermediate TRIP position; Mandatory rule: rotate back to OFF before closing again, preventing forced power-on before fault elimination.

✅ Suitable for: Equipment maintenance safety management, European & overseas exported machines, applications requiring Lockout/Tagout (LOTO), cabinet door external operation.

2.2 Short-circuit Breaking Capacity (Key Engineering Selection Factor)

GV2ME21: Icu=10 kA @400V

GV2P21: Icu=50 kA @400V

If prospective short-circuit current of upstream power supply exceeds 10 kA, GV2ME21 is strictly prohibited; GV2P21 must be selected, otherwise the circuit breaker risks rupture under short-circuit conditions.

2.3 Accessory Compatibility Reminder

Side-mounted auxiliary contacts, fault contacts, shunt/undervoltage releases are electrically interchangeable;

Front-panel accessories are NOT interchangeable: extended cabinet handle only compatible with GV2P, unavailable for GV2ME;

⚠️ Cannot directly replace each other despite identical mounting dimensions!

Different internal mechanisms lead to inconsistent panel cutout and interlock logic; drawing revision and re-verification are required.

3. Selection Recommendation

✅ Choose GV2ME21

1. General domestic control cabinets, system short-circuit current ≤10 kA;
2. Only local operation inside cabinet, no padlocking or external door operation required;
3. Cost-sensitive projects with no mandatory UL Type F requirement for North America.

✅ Choose GV2P21

1. System short-circuit current >10 kA;
2. Lockout/Tagout (LOTO) required for maintenance; need external cabinet handle;
3. Export equipment, overseas projects (EU, Southeast Asia, North America);
4. Process requirement: manual reset to OFF before reclosure after trip, to avoid accidental equipment startup.

Application Scenario Breakdown: GV2ME21 vs GV2P21

Core hardware boundary recap:

GV2ME21: Push-button | Icu=10kA @400V

GV2P21: Rotary handle | Icu=50kA @400V, supports LOTO padlocking, visible isolation & extended external handle

Both share identical thermal trip range 17～23A and motor protection curves. Application differences are determined by safety specifications, short-circuit capacity and operation requirements.

1. Preferred Application Scenarios for GV2ME21 (Push-button Type)

✅ Recommended Scenarios

1. General domestic civil & light industrial control cabinets, prospective short-circuit current ≤10 kA

Ordinary fans, standard water pumps, small conveyors, dust removal fans, auxiliary machine motors for machine tools; systems far from distribution transformers with low short-circuit current.

2. Circuit breaker only used for internal cabinet protection, no external cabinet operation required

No need for external operating mechanism; operators only open cabinet door for operation.

3. Workshop without strict mandatory LOTO lockout/tagout regulations

Loose maintenance management with no compulsory safety locking specifications.

4. Economical standard complete equipment, mass general machinery with cost control priority

Packaging machinery, small production lines, HVAC terminal equipment.

5. Short-cycle repeated startup, scenarios requiring rapid reset after tripping

Red button pops after trip; reset simply by pressing STOP for convenient operation.

❌ Forbidden Scenarios

1. Outgoing circuits close to transformers, busbar short-circuit current >10 kA;
2. EU/North America export machines, projects requiring visible isolation and LOTO safety locking;
3. Need to install extended external cabinet operating handle;
4. Explosion-proof areas, heavy-duty equipment, high-risk production machinery.
5. Preferred Application Scenarios for GV2P21 (Rotary Handle Type)

✅ Recommended Scenarios

1. System short-circuit current >10 kA (Primary hard selection criterion)

Distribution rooms adjacent to transformers, large-capacity busbars, power center feeder circuits with high short-circuit current requiring enhanced breaking capacity.

2. Lockout/Tagout (LOTO) safety locking requirement for maintenance

Production line maintenance, stamping equipment, conveyors, auxiliary hoisting mechanisms, chemical & food machinery; padlockable in OFF position to prevent accidental closing, compliant with OSHA and GB safety standards.

3. External cabinet door operation (with optional extended rotary handle)

Start/stop and open/close without opening cabinet doors, delivering better human-machine operability.

4. Export machinery & overseas projects (EU, Southeast Asia, North America)

Compliant with UL508 Type F and IEC visible isolation requirements; overseas acceptance standards generally prefer rotary-operated motor circuit breakers.

5. High-risk loads to prevent blind restart after fault

Handle stays at TRIP mid-position after tripping; must turn back to OFF before closing; eliminate risk of restarting before fault troubleshooting. Suitable for mixers, crushers and hydraulic station motors.

6. Application as circuit isolating device

OFF position provides visible isolation gap; a separate disconnector can be omitted in some drawings.

❌ Not Recommended Scenarios

Extremely tight budget, low short-circuit current, no special safety specifications, purely cost-driven simple equipment.

3. Quick Selection Table by Operating Conditions

4. Common Engineering Misunderstandings Reminder
5. Do not interchange simply based on identical current rating

Even with same 17～23A setting, replacing GV2P21 with GV2ME21 will create severe short-circuit hazard if on-site short-circuit current exceeds 10 kA.

2. Common practice among panel builders: GV2ME series for HVAC; GV2P series for industrial production lines, power cabinets and export equipment.
3. Auxiliary contacts (GV2AN11/GV2AD10) are electrically interchangeable, yet front operating mechanisms differ; cabinet panel cutouts cannot be modified for direct replacement.