CHINT JYB-714 Liquid Level Relay 3A AC220V

Full Name: CHINT JYB-714 Series Liquid Level Relay (YB-714 is a simplified model)

Key Specifications:

Control voltage: AC220V 50Hz

Contact rating: 3A AC220V (resistive load)

Contact configuration: 1 changeover contact (NO + NC)

Probe current: ≤ 50μA (safe low current)

Control distance: ≤ 1km (length of probe cable)

Operating temperature: -5°C ~ +40°C

2. Core Functions & Applications

Function: Detects water level via electrodes, automatically controls pump start/stop, supporting water supply / drainage modes.

Typical Applications:

Civil water towers, elevated tanks, underground cisterns

Industrial circulating water systems, small sewage treatment equipment

Not suitable for: Oil, pure water (low conductivity), flammable and explosive liquids

3. Operating Principle (Electrode Detection)
4. Water Supply Mode: When water level is below the low limit, electrodes 5-6 conduct, relay energizes, pump starts. When water rises to high limit, electrodes 6-7 conduct, relay de-energizes, pump stops.
5. Drainage Mode: When water level exceeds high limit, electrodes 6-7 conduct, relay energizes, pump starts. When water drops to low limit, electrodes 5-6 disconnect, relay de-energizes, pump stops.
6. Terminal Definition (Standard 8‑pin Base)

5. Typical Wiring (Single‑phase Water Pump)
6. Water Supply Control:

Terminal 1 to L, Terminal 5 to N

Terminal 6 to middle level, 7 to high level, 8 to low level

Terminal 4 (NO) + Terminal 3 (COM) connect to contactor coil control

2. Drainage Control:

Terminal 1 to L, Terminal 5 to N

Terminal 6 to middle level, 7 to high level, 8 to low level

Terminal 2 (NC) + Terminal 3 (COM) connect to contactor coil control

6. Installation & Usage Notes
7. Electrode Installation:

Electrode material: 304 stainless steel recommended for corrosion resistance

Spacing: ≥ 10cm between high/low electrodes; ≥ 15cm between electrodes and tank wall

Avoid installation in bubble‑prone areas

2. Electrical Safety:

Route signal cables separately, keep ≥ 30cm from power cables

Must be protected by a 10A circuit breaker

Use waterproof junction boxes in damp environments

3. Daily Maintenance:

Clean scale and dirt from electrodes regularly to maintain conductivity

Inspect probe cable insulation for damage

7. Common Faults & Troubleshooting

8. Selection & Alternatives

Upgraded Model: JYB-714B (with LED indicator for clearer status)

Alternative Brands: Xinling HHY7G/HHY7P, People Electrical Appliance JYB series (parameter‑compatible)

Note: For high‑power pumps, must use an AC contactor; do not drive directly (limited 3A contact capacity)

Recommended Replacements for CHINT JYB-714 (YB-714) 3A AC220V Liquid Level Relay

1. CHINT Original Upgraded Alternatives

Matching Core Parameters: All retain 3A AC220V contact rating, 1 changeover contact, electrode detection, fully compatible with original base and wiring.

2. Direct Domestic Brand Alternatives (100% Parameter Compatible)
3. Delixi Series

JYB-714 AC220V (standard type)

JYB-714A AC220V (improved, stronger anti-interference)

Features: Same platform design as CHINT, universal 8‑pin base, lower price, wide service network.

2. Xinling Electric Series

HHY7G AC220V (water supply dedicated)

HHY7P AC220V (drainage dedicated)

Features: 3A AC220V contact rating, control distance up to 100m, suitable for long probe cables.

3. People Electrical Appliance Series

JYB-714 AC220V liquid level relay

Features: Compliant with GB/T14048.5, excellent moisture resistance, ideal for humid environments.

3. Specialized Alternatives (Upgraded Functions / Special Environments)
4. CKC (Taiwan)

C61F-GP-N AC220V non-float liquid level relay

Advantages: Imported quality, strong anti-interference, suitable for precision control, supports 3A AC220V load.

2. OMRON

61F-GP AC220V liquid level control relay

Advantages: Internationally renowned, high reliability, LED status indication, suitable for critical equipment.

Note: Requires dedicated base, higher cost.

3. Wireless / Smart Alternative

CHINT NB-IoT Intelligent Liquid Level Controller: Remote monitoring, mobile APP control, suitable for unattended sites.

Features: No wiring needed, data transmission via NB-IoT, supports water level alarms and history query.

4. Key Compatibility Requirements for Replacement

5. Recommendation Priority
6. First Choice: CHINT JYB-714B/C → Original upgrade, fully compatible, clear indication
7. Best Value: Delixi JYB-714A → Affordable, stable, convenient service
8. Industrial Use: Xinling HHY7G/7P → Long distance, strong anti-interference
9. Critical Equipment: OMRON 61F-GP → High reliability for continuous operation

Complete Model List of CHINT Liquid Level Relays

CHINT liquid level relays are available in three main series: JYB-714 (basic type), NJYW1 (industrial enhanced type), and NJB1-YW (modular type). Below is the complete model list by series.

1. JYB-714 Series (Core Basic Series)

1.1 Standard Models

1.2 Upgraded Models (with LED Indicator)

Common Parameters:

Contact rating: 3A AC220V (resistive load)

Contact configuration: 1 changeover contact (NO + NC)

Probe current: ≤ 50μA

Control distance: ≤ 1km

Mounting: Standard 8‑pin base (universal)

2. NJYW1 Series (Industrial Enhanced Series)

Series Advantages: Protection class IP40, improved anti-interference, stable probe current ≤40μA.

3. NJB1-YW Series (Modular Series)

Features:

DIN rail mounting (35mm standard) for automation integration

Fault diagnosis, PLC compatible

Contact rating increased to 5A AC220V, suitable for direct small pump control

4. Model Naming Explanation
5. JYB-714 Series: JYB (liquid level relay)-714 (design code)-[A/B/C] (version: A=basic, B=single LED, C=dual LED)-voltage
6. NJYW1 Series: N (CHINT) JYW (liquid level relay) 1 (code)-[NL/BL] (NL=standard, BL=explosion‑proof)-[1/2] (distance: 1=1km, 2=2km)-voltage
7. NJB1-YW Series: N (CHINT) JB (modular) 1 (code)-YW (liquid level control)-voltage
8. Selection Parameter Comparison