Schneider EZSS630F3630 MCCB

Technical Specifications and Selection Guide for Schneider EZSS630F3630

EZSS630F3630 is a 3P 630A Moulded Case Circuit Breaker (MCCB) from Schneider Electric’s EasyPact EZS+ Series (Dunhuang Series). Its official order code is EZSS630F3630, with the full model description EZS-S630 36kA TM630D 3P3D, designed for power distribution protection.

1. Model Code Explanation

2. Parametrii tehnici de bază

3. Mediul de aplicare
4. Aplicații principale

Main or branch switch in low-voltage distribution systems of industrial plants, commercial buildings and large public facilities

Secondary distribution, civil construction and electromechanical markets

Protect motors, transformatoare, generators and other electrical equipment against overload and short-circuit damage

2. Cerințe de mediu

Temperatura de functionare: -5℃~+40℃ (derating required above 40℃)

Relative humidity: ≤95%, necondens

Altitudine: ≤2000m (derating required above 2000m)

Installation location: Indoor, vertical mounting (înclinare ≤5°)

Pollution degree: Degree 2 (standard), applicable to degree 3 environments (with special treatment)

4. Cross-Brand Equivalent/Replacement Models

5. Official Order Information

Official Order Code: EZSS630F3630

Common Accessories:

Contact auxiliar: LV429310 (1NU+1NC)

Shunt trip: LV429410 (220VAC)

Undervoltage release: LV429510 (220VAC)

Plug-in base: LV429100 (for 630A)

Motor mechanism: LV420089 (24VDC)

6. Complete Model List of This Series (630A Frame)

7. Installation and Maintenance Notes
8. Precauții de instalare

For fixed mounting, reserve sufficient operating space (handle space ≥120mm)

Tighten terminals to specified torque (recommended for copper conductors: 40N·m for M10 bolts)

Maintain spacing ≥20mm between side-by-side units for proper heat dissipation

2. Recomandări de întreținere

Inspecție regulată (at least once per year): appearance, fasteners, operating mechanism flexibility

After short-circuit tripping, inspect contact condition and replace if necessary

Thermal-magnetic trip units are non-adjustable; replace with electronic trip models if parameter adjustment is needed

8. Selection and Replacement Recommendations
9. Selection Factors

System short-circuit current level (ensure Icu ≥ calculated value)

Load type (D-curve for distribution protection, motor-specific type for motor protection)

Installation space and operation method

Future expansion (reserve 10%–20% margin)

2. Soluții alternative

For more precise protection and adjustable parameters, upgrade to CVS630F ETS2.3 electronic trip model

For communication and remote monitoring, select NSX630F series with intelligent trip units such as Micrologic 5.3A

For budget-limited projects, consider domestic alternatives including Chint NM1 and Delixi CDM3 series

Detailed Connection Methods for Schneider EZSS630F3630

The standard connection method of Schneider EZSS630F3630 (EZS-S630 36kA TM630D 3P3D) is fixed front connection, with multiple optional connection configurations as follows:

1. Basic Connection Methods and Configuration Options

2. Connection Technical Details
3. Terminal Types

Circuitul principal: Copper bolt terminals, suitable for cables or busbars

Circuit de control (with auxiliary contacts, shunt/undervoltage releases): Plug-in terminals for easy secondary wiring

2. Conductor Specifications

Suitable copper conductor cross-section: Up to 185mm² cable or equivalent busbar

Terminal tightening torque: 40N·m recommended for M10 bolts to ensure reliable connection

Supported connections: Direct cable connection, busbar connection (with dedicated clamps)

3. Polarity and Phase Sequence

3P3D configuration: Connect L1, L2, L3 three-phase power; no neutral (N) necesar

Markings: Clear phase sequence labels (1, 2, 3 correspond to L1, L2, L3) on the breaker body

3. Connection Precautions and Specifications
4. Pregătirea înainte de instalare

Ensure breaker is OFF, disconnect upstream power and verify voltage absence

Clean terminal surfaces and remove oxidation before connection

Select properly sized conductors to avoid overheating or improper fitting

2. Wiring Standards

Maintain equal length for each phase in main circuit to avoid unbalanced stress

Route control circuit separately from main circuit to reduce electromagnetic interference

Check terminal tightness after wiring to prevent loose connections

Ensure no tools or debris inside the breaker after wiring; reinstall protective covers

3. Special Environment Requirements

Vertical mounting: Must be installed vertically (înclinare ≤5°) for proper arc extinction and mechanism operation

Derating: Derate accordingly when temperature >40℃ or altitude >2000m, adjust conductor size accordingly

Pollution degree 3: Additional protection required to prevent dust and moisture from affecting insulation

4. Recommended Connection Accessories

The following accessories are available for extended functions or special installations:

5. Selection and Application Advice
6. Configurație standard: Fixed front connection preferred for general distribution, balancing cost and practicality
7. Confortul de întreținere: Plug-in front connection recommended for frequent maintenance, reducerea timpului de nefuncţionare
8. Space Restrictions: Fixed rear connection can be used for limited cabinet depth, with sufficient operating space reserved
9. Control Expansion: Reserve control wiring space and use suitable secondary accessories for remote control or monitoring