Schneider C60H-DC C-curve DC supplementary protector

Product positioning and standards

Product Usage

Used for short-circuit protection, overload protection, control and isolation of DC circuits, suitable for industrial control, automation, transportation, and new energy systems.

Belongs to supplementary protector, TC 3 category.

execution standard

IEC/EN 60947‑2、UL1077、GB 14048.2

Core electrical specifications

1. Voltage and number of poles

Specification 1P 2P

Rated working voltage Ue 12… 250V DC 12… 500V DC

Rated voltage Un 250V DC 500V DC

Width 2 molds (9mm) 4 molds (9mm)

2. Breaking ability

table

Voltage 1P breaks 2P breaks

110V DC — 20kA

220V DC — 10kA

250V DC 5kA 6kA

440V DC — 10kA

500V DC 5kA 6kA

3. Release characteristics

Curve type: C-curve

Magnetic release range: 7In~10In (standard value 8.5In ± 20%)

Category: Class A (No Delay)

4. Key electrical parameters

Rated insulation voltage Ui: 500V DC

Impact withstand voltage Uimp: 6kV

Mechanical lifespan: 20000 cycles

Electrical lifespan: 3000 cycles for inductive circuits; Resistive circuit 6000 times

Environmental and physical parameters

Working temperature: -25 ℃~+70 ℃

Storage temperature: -40 ℃~+85 ℃

Humidity: 95% (55 ℃, no condensation)

Pollution level: 3

Weight: 1P ≈ 128g; 2P≈256g

Wiring and safety requirements

Polarity must be strictly distinguished, and reverse connection may cause fire/electric shock.

Both upward and downward wires can be used, and the polarity must be consistent.

When 2P series is used for American systems, the cable length is ≥ 30cm.

Tightening torque:

≤25A：2.5N·m

＞25A：3.5N·m

Attachment system

Instructions and release attachments

SD: Fault indicator contact

OF: Position auxiliary contact

MN: Under voltage trip

MX: Split excitation release

Installation and wiring accessories

Insulated connectors, comb shaped busbars, high current terminals, ring terminals, inter electrode partitions, lockable handles, marking strips, etc.

The attachment is installed on the left side of the circuit breaker, with a total width of ≤ 54mm.

Extreme configuration and fault protection

24V~250V: Prioritize 1P (grounding polarity) or 2P full protection.

250V~500V: 2P must be used.

Different grounding systems have different fault types (A/B/C) and protection polarity requirements, which require corresponding breaking capacity.

Temperature reduction

Provide a complete temperature rated current comparison table, with a significant reduction in rated current at 70 ℃.

Multiple units installed side by side require a capacity reduction factor of 0.8.

Key issues

Question 1: What is the C-curve tripping characteristic of C60H-DC? What faults are mainly protected?

answer

The magnetic trip interval of the C-curve is 7In~10In (standard 8.5In ± 20%).

Mainly achieve two types of protection:

Overload protection: thermal trip, slow disconnection due to long-term overcurrent.

Short circuit protection: Magnetic trip, instantaneous disconnection due to high current.

Simultaneously equipped with isolation function, meeting the safety disconnection requirements of IEC standards.

Question 2: What are the core differences between P and 2P models in terms of voltage, breaking capacity, and application scenarios?

answer

1P: Maximum 250VDC, breaking 5kA, width of 2 modes, used for grounding polarity single pole protection (24-250V system).

2P: up to 500VDC, breaking up to 20kA, width of 4 modes, used for ungrounded systems/high voltage DC (250~500V), while protecting the positive and negative poles.

Simple rule: 1P is available for ≤ 250V; 2P is required for ＞ 250V.

Question 3: Why must polarity be strictly followed when wiring? What are the consequences of reversing? How to avoid it?

answer

Reason: The DC arc extinguishing and breaking structure is designed according to polarity, and reverse connection can cause arc extinguishing failure and breaking failure.

Consequence: Short circuit cannot be disconnected → Fire, explosion, equipment burning, personal injury.

Avoidance methods:

Strictly follow the panel * * ± label * * for wiring.

Both upward and downward movements are acceptable, but the polarity cannot be reversed.

Double check the polarity after wiring.