CHINT CJ20-160 AC Contactor

モデルの意味 & Basic Positioning

Part	意味
CJ	AC Contactor (China Contactor)
20	Design No. (20th generation)
160	Rated operational current 160A (AC‑3 category)

CHINT CJ20‑160 is a 3‑pole AC contactor, a main model in the CJ20 series, suitable for frequent operations such as motor control. It complies with GB/T 14048.4 and IEC/EN 60947‑4‑1 standards.

2. コア技術パラメータ

電気的性能

Item	価値	注意事項
定格動作電流 (AC-3)	160あ	Controls motor power 85kW at 380V
Conventional thermal current (Ith)	200あ	Long‑time permissible current in free air
定格絶縁電圧 (Ui)	690V	Maximum voltage withstand class
定格動作電圧 (うえ)	Up to 660V (50/60Hz)	Main circuit voltage range
Control coil voltage	110V/127V/220V/380V etc.	220V and 380V are common
Coil power consumption	Inrush 855VA, Holding 85.5VA (50Hz)	Energy‑saving versions available
Rated operational frequency (AC-3)	1200 稼働時間/時間	モーター制御に典型的
Making/breaking capacity	10 × rated current (1s)	Withstands motor starting surge
Auxiliary contacts	Standard 2NO+2NC (expandable)	For control circuit signaling
Mechanical endurance	10 100万操作	Electrical endurance (AC-3): 1 100万操作

Mechanical Structure
Double‑break direct‑acting structure, excellent arc extinguishing
Main contacts made of silver‑based alloy, arc‑resistant and anti‑welding
Overall modular design, easy installation and maintenance
Compatible with RT16‑315 fuse protection

3. Mounting Dimensions & 重さ

Item	価値 (mm)
Width (あ)	146
Height (B)	187
深さ (C)	178
Mounting hole spacing	130×130 (±0.5)
Mounting hole diameter	9mm
重さ	約. 5.5kg

取り付け: Standard 35mm DIN rail or bolt fixing

4. 応用 & セレクションガイド

Scope of Application
1. AC50/60Hz, power circuits up to 660V
2. Remote switching on/off, frequent control of three‑phase asynchronous motors
3. サーマルリレーとの組み合わせ (例えば, NR2シリーズ) into magnetic starters for overload protection
4. Typical uses: ファン, pumps, コンプレッサー, conveyors and other industrial equipment

Selection Notes
For motor control, select according to AC‑3 category (160A ≈ 85kW/380V)
Coil voltage must match control circuit (commonly 220V/380V)
Auxiliary contact quantity to meet control requirements (expandable)
Consider operating frequency and environment (temperature, humidity, altitude)

5. International Brand Replacements

ブランド	Replacement Model	互換性
シーメンス	3RT2036‑1AP00	Same current class, similar dimensions
ABB	A165‑30‑11	165あ, direct replacement
シュナイダー	LC1D15000M7C	150あ, suitable for light loads
シュナイダー	LC1D18000M7C	180あ, 重い荷物に適しています
Eaton (Moeller)	DIL M175	175あ, high performance match

6. Operation & メンテナンス

1. Inspect integrity before installation, remove packaging
2. Ensure terminals are tightly secured to avoid overheating
3. Regularly check contact wear; replace silver alloy contacts at 1/3 thickness
4. Clean arc chute to remove carbon deposits
5. Do not use without arc chute to prevent arc short‑circuit
6. コイル電圧範囲: 85%–110% of rated value

7. CJ20 Series Model List

モデル	定格電流 (あ)	Control Power (kW/380V)	Ith (あ)
CJ20‑10	10	4.5	16
CJ20‑16	16	7.5	25
CJ20‑25	25	11	40
CJ20‑40	40	22	63
CJ20‑63	63	30	100
CJ20‑100	100	55	140
CJ20‑160	160	85	200
CJ20‑250	250	132	315
CJ20‑400	400	200	500
CJ20‑630	630	315	800

The mechanical endurance of CHINT CJ20‑160 is 10 100万操作, the standard design index for no‑load cycles under normal conditions.

Additional Info
1. Electrical endurance: Under AC‑3 (モーター制御), 1.2 million operations – lower due to arcing and contact wear
2. Series difference: CJ20‑10 ~ CJ20‑160: 10 100万操作; CJ20‑250/400/630: 6 100万操作
3. Life factors: Actual service life depends on frequency, environment, and maintenance

CHINT CJ20 Series: Core Advantages vs Other Series

The CJ20 series is a classic CHINT contactor line with strong advantages in heavy‑duty performance, 遮断容量, durability and compatibility, especially compared with CJX2, NC1 and CJ40 series.

1. Structural & Performance Advantages

1.1 Excellent Breaking & Arc Extinguishing
Double‑break direct‑acting structure; models above 40A use ceramic longitudinal or grid arc chutes, better than CJX2
Breaking capacity up to 10× rated current (1s), withstands heavy motor starting
Silver‑based alloy main contacts: low resistance, stable temperature rise

1.2 Long Mechanical & Electrical Endurance

シリーズ	Mechanical Endurance (160あ)	Electrical Endurance (AC-3)	Features
CJ20	10 million	1 million	Full series 10M (250A+: 6M)
CJX2	6–10M	0.6–1M	Smaller sizes lower
NC1	6–10M	0.6–1M	Newer, better energy saving

1.3 Modular & Versatile
Independent auxiliary contacts: standard 2NO+2NC, expandable
Compatible with RT16‑315 fuses and protection modules
35mm DIN rail or bolt mounting

2. Advantages vs Other CHINT Series

2.1 vs CJX2 (Economic Type)

Item	CJ20	CJX2	応用
Heavy‑duty	Up to 630A, 315kW	Max 95A, ~45kW	CJ20 for large industrial equipment
Breaking	Strong, for frequent/ reverse starting	中くらい, normal duty	CJ20 for crushers, mills
Environment	Robust, dust/ heat resistant	Compact, clean environments	CJ20 for metallurgy, mining

2.2 vs NC1 (New Energy‑Saving)
Proven stable platform: decades of field use, low failure rate, ideal for retrofit projects
AC/DC energy‑saving modules (≥63A): low noise
Better price in same size

2.3 vs CJ40 (High‑Performance)
Wider compatibility with thermal relays (例えば, NR2)
Simpler installation & maintenance, standard dimensions

3. Key Application Strengths
1. High‑power motors: 85kW (160あ) to 315kW (630あ)
2. 頻繁な起動 & reversing: up to 1200 稼働時間/時間
3. Long‑distance control in large plants, mines
4. Harsh environments: –25°C to +40°C, dust, vibration

Core Value of CJ20 Series

CJ20 stands out for maturity, reliability, heavy‑duty capability and strong breaking performance. It is the top choice for heavy industrial control. While slightly less compact or energy‑efficient than CJX2/NC1, it excels in robustness and durability for demanding traditional industry and equipment upgrades.