DX3 MCBs rated up to 63 A are shown in this section through technical data: selectivity with upstream/downstream MCBs and with DPX3/DPX MCCBs at 415 V, time-current characteristics (C curve 6-63 A, D curve 0.5-63 A, IS/IEC 60898-1, calibrated at 30 °C), 3-phase motor MCB selection and use on DC circuits. DX3 6000 and DX3 10000 MCBs (1P-4P, In up to 63 A) are designed for 230/400 V AC supplies and can also be used on DC circuits with the stated deratings.

Key features

• C curve (6-63 A) and D curve (0.5-63 A) time-current characteristics
• Selectivity tables with DX3 50 kA upstream MCBs and downstream MCBs up to 63 A at 415 V
• Total discrimination with DPX3 / DPX MCCBs upstream for many ratings
• Can be used on DC circuits (max 80 V per pole) with 1.4x magnetic trip derating
• Combinable with DX3 auxiliaries (see auxiliaries section)

Applications

• Lighting and power circuit protection
• 3-phase motor circuits (DOL and star-delta selection chart)
• DC circuits with deratings

Specifications

Rated Voltage: 230/400 V AC (DX3 6000 and DX3 10000, 1P/2P/3P/4P, In up to 63 A) | Rating Range: 0.5 - 63 A (D curve); 6 - 63 A (C curve) | Tripping Curves: C and D | Range Names: DX3 6000; DX3 10000 (10 kA); DX3 50 kA | Reference Standard: IS / IEC 60898-1 | Reference Calibration Temperature: 30 °C | DC Use - Max Operating Voltage: 80 V per pole (60 V for 1P+N MCBs) | DC Use - Magnetic Trip Threshold: AC threshold x 1.4 (e.g. C curve 5-10 In on AC = 7-14 In on DC) | DC Use - Thermal Tripping: Same time/current curve as AC | DC Breaking Capacity (single pole, max 80 V DC per pole): 4000 A | Overall Dimensions A / C / D / E / F / G (mm, p75 table; letters refer to the brochure's dimension drawing): A 70 / C 60 / D 83 / E 44 / F 76 / G 94 | Lighting Circuit Guidance: One lighting circuit can have up to 800 W or up to 10 points | Power Circuit Guidance: One power circuit can have up to 3000 W or up to 2 power points | 3-Phase Motor Selection - DOL (MCB rating, DX3 10 kA MCBs and RCBOs): 1 HP/0.75 kW: 1.6 A; 1.5 HP/1.10 kW: 2 A; 2 HP/1.50 kW: 3 A; 3 HP/2.25 kW: 4 A; 4 HP/3.00 kW: 10 A; 5 HP/3.75 kW: 10 A; 6 HP/4.50 kW: 10 A; 7.5 HP/5.50 kW: 16 A; 10 HP/7.50 kW: 20 A; 12.5 HP/9.30 kW: 25 A; 15 HP/11.00 kW: 32 A; 17.5 HP/13.00 kW: 32 A; 20 HP/15.00 kW: 40 A; 25 HP/18.50 kW: 50 A; 30 HP/22.50 kW: 63 A | 3-Phase Motor Selection - Star-Delta (MCB rating, DX3 10 kA MCBs and RCBOs): 5 HP/3.75 kW: 10 A; 6 HP/4.50 kW: 10 A; 7.5 HP/5.50 kW: 16 A; 10 HP/7.50 kW: 16 A; 12.5 HP/9.30 kW: 20 A; 15 HP/11.00 kW: 25 A; 17.5 HP/13.00 kW: 25 A; 20 HP/15.00 kW: 40 A; 25 HP/18.50 kW: 40 A; 30 HP/22.50 kW: 50 A; 35 HP/26.00 kW: 63 A | Motor Selection Note: Guidance only; exact rating must be selected after considering motor characteristics

Standards: IS / IEC 60898-1