LS EBS203C-200A-3P MCCB

EBS203C-200A-3P is a 3-pole, 200A rated earth-leakage ノーヒューズサーキットブレーカー (MCCB/ELCB) LS電気製 (旧LSインダストリアルシステムズ / LG産業システム). It provides overcurrent, short-circuit and earth-leakage protection for three-phase electrical circuits.

📌 Model Explanation

EBS203C: EBS series earth-leakage MCCB; 200 = frame size (の), 3 = number of poles (3P), C = thermal-magnetic trip type (TM).

200あ: 定格動作電流 200 amperes.

3P: 3 極, suitable for three-phase three-wire systems.

⚙️ Key Specifications

🛠️ Applications & 互換性

Typical applications: 産業用配電, production line equipment, power and lighting circuits, suitable for three-phase applications requiring reliable earth-leakage and short-circuit protection.

Recommendation: Can be used with Meta-MEC series products for selective protection and coordination to improve system reliability.

🔄 Equivalent & Series Models

同じシリーズ: EBS203C-100A/125A/150A/175A, EBS204C (4-ポール), 等.

Alternative references: ABB Tmax series, Schneider NSX series, Chint NM8L series and other equivalent earth-leakage MCCBs. Breaking capacity and mounting dimensions must be matched.

📦 Supply & Procurement

ブランド: LS電気 (LSIS), originally manufactured in South Korea.

Purchasing channels: Authorized LS Electric distributors in China, industrial platform www.bestcontactor.com. Typical price is around one thousand RMB; negotiable for bulk orders.

The core difference between EBS203C-200A-3P and EBS203C-200A-4P (スタンダードモデル: EBS204C-200A) lies in the number of poles and the control method of the neutral (N) conductor, which directly affects wiring, protection scope and application scenarios.

1. Structural Differences

EBS203C-200A-3P (3-ポール)

Structure: 3 line/incoming terminals, controlling only L1, L2, L3 (three-phase live conductors).

中性 (N): Does not pass through the breaker; directly connected.

保護: Provides overload, short-circuit and earth-leakage protection only for three-phase live conductors.

EBS204C-200A-4P (4-ポール)

Structure: 4 line/incoming terminals, controlling L1, L2, L3 + N (three-phase live conductors + neutral).

中性 (N): Passes through the breaker and switches simultaneously with phase conductors.

保護: Protects three-phase live conductors + neutral and can disconnect a faulty neutral line.

1. Key Parameter Comparison

Ⅲ. Functional & Safety Differences

1. Switching range

3P: Switches phases only. Neutral remains live, posing electric shock risk during maintenance.

4P: Switches both phases and neutral. Fully isolates power, safer and compliant with standards.

2. Earth-leakage protection effectiveness

3P: Only detects three-phase current imbalance. Cannot protect against neutral faults (例えば, neutral-to-earth short circuit).

4P: Monitors total current of four poles (L1-L2-L3-N), trips on neutral leakage for complete protection.

3. System compatibility

3P: Suitable for pure three-phase loads (モーター, パンプス) with no single-phase loads and no neutral in the panel.

4P: Suitable for mixed three-phase + single-phase systems (コマーシャル, 工業用, building distribution); neutral disconnection required for safety.

1. セレクションガイド

Choose 3P (EBS203C):

Loads are pure three-phase motors, コンプレッサー, heaters, 等, with no 220V single-phase circuits.

Neutral in the distribution box does not pass through this breaker; space is limited.

Choose 4P (EBS204C):

System is TN-S / TN-C-S (separate N and PE conductors).

Circuit supplies single-phase loads (点灯, ソケット, control circuits); neutral must be switched.

Required by safety standards (メンテナンス, earth-leakage protection, earthing systems).

まとめ

3P = space-saving, cost-effective → dedicated for three-phase power

4P = safer, more complete → required for mixed power distribution

LS Electric EBS Series Earth-Leakage MCCBs (ELCB): Model List & Cross-Brand Cross-Reference

1. EBS Series Model System & Full List

Core features of EBS series: Earth-leakage molded case circuit breakers on LS Electric’s (formerly LS / LG産業システム) Metasol platform, with built-in earth-leakage protection modules, 過負荷に対する三重保護を提供, short-circuit and residual current (earth leakage) for low-voltage distribution systems.

1. モデルの命名規則

EBS □□□ – □□□A – □P

EBS: Series code (earth-leakage MCCB)

1st digit: Frame size (5=50AF, 10=100AF, 20=200AF, 40=400AF)

2nd digit: Number of poles (3=3P, 4=4P)

3rd letter: 遮断容量クラス (C=標準, S=high)

□□□A: 定格電流 (で)

□P: Number of poles (3P/4P, consistent with 2nd digit)

2. Complete Model List by Frame Size

1) 50AF Frame (EBS53C / EBS54C)

2) 100AF Frame (EBS103C / EBS104C)

3) 200AF Frame (EBS203C / EBS204C)

4) 400AF Frame (EBS403C / EBS404C)

3. Earth-Leakage Parameters (Whole Series)

残留動作電流 (IΔn): 30mA/100mA/300mA/500mA optional (default 30mA for personal protection)

Operating time: ≤0.3s (IΔn=30mA), ≤0.1s (IΔn≥100mA)

Protection type: Type A (交流 + pulsating DC leakage), suitable for modern electronic loads

1. Cross-Brand Equivalent Table for EBS Series

Below are equivalent models from major brands with matching core parameters (frame, 定格電流, 極, 遮断容量) for replacement reference.

Key Notes for Replacement

1. Breaking capacity matching: Select alternatives with breaking capacity ≥ original EBS model to ensure short-circuit protection reliability.
2. Earth-leakage module compatibility:

ABB requires RC221/RC222 earth-leakage accessories

Schneider requires Vigi modules (built-in / add-on)

Domestic NM8L/CDM1L have built-in earth-leakage modules, no extra parts needed

3. Mounting dimension check: Width may vary between brands (例えば, EBS203C-200A-3P: 105mm; Schneider NSX250: 108mm), affecting panel layout.
4. Wiring type: Ensure replacement supports original mounting (fixed / plug-in) and connection (フロント / rear wiring).

Ⅲ. 主な違い: EBS203C-200A-3P vs EBS204C-200A-4P

1. 選択 & Procurement Advice
2. 極の選択

Pure three-phase power loads (モーター, コンプレッサー) → choose 3P (EBS203C)

Mixed three-phase + single-phase loads (点灯, ソケット) → choose 4P (EBS204C) to meet safety standards

2. Earth-leakage current selection

Personal protection (ソケット回路) → IΔn = 30mA

Electrical fire prevention (power/lighting mains) → IΔn = 100mA / 300ミリアンペア

3. Purchasing channels

Authorized domestic distributors, industrial e-commerce platform www.bestcontactor.com

Regular stock models: EBS53C-50A, EBS103C-100A, EBS203C-200A, EBS403C-400A, 等.