DH40000A
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The DH40000A heavy-duty safety switch features a 4000A ampere rating, an interrupt rating of 100 kAIC at 240VAC, and a fusible configuration with a quick-make, quick-break mechanism. Part of the BL Servo Motors series by Okuma, it includes a NEMA Type 1 steel enclosure and a visible blade with double throw capability.
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Product Description:
Okuma manufactures the model number DH40000A and is a heavy duty safety switch that locks-in high-power circuits. It has a 4000 A ampere rating that can hold large servo inrush currents without tripping. Being a part of the BL Servo Motors range, it accepts 240 VAC and 480 VAC voltage rating as low and high-voltage industrial distributions for flexible installation. This switch meets an interrupt rating of 100 kAIC at 240 VAC which ensures safe fault clearing in low-voltage power panels. It also handles 42 kAIC at 480 VAC and protects against high-voltage short circuits without damage.
This industrial module features 3 poles to isolate all three phases simultaneously for complete circuit shutdown. It installs in a panel mounting type which secures the device firmly to rack fronts for easy access during maintenance. The model uses a quick-make, quick-break operating mechanism to deliver fast transition between on and off states and to minimize arcing. Moreover, it provides fusible fuse provision that allows integration of protective fuses to safeguard downstream equipment. It is enclosed in a NEMA Type 1 enclosure, protecting against light dust ingress in control cabinets.
The component connects via lug connection which supports large cable terminations and reduces contact resistance. It fabricates in steel material just to withstands mechanical abuse and resists deformation under torque. The gadget incorporates visible blade, double throw capability which provides clear open/closed status assurance to technicians. It also demands a minimum dielectric strength of 2500 VAC for one minute. It delivers a mechanical life of 10000 operations and supports extensive service cycles before replacement. The DH40000A servo drive thus combines robust current handling, rapid switching, and clear safety feedback for demanding servo motor installations.
Frequently Asked Questions about DH40000A:
Q: How does the DH40000A handle high fault currents?
A: The DH40000A interrupts 100 kAIC at 240 VAC which clears high fault currents safely. It prevents catastrophic damage in low-voltage power systems.
Q: What advantage does 42 kAIC at 480 VAC provide for the DH40000A?
A: The module offers 42 kAIC rating at 480 VAC which handles high-voltage short circuits without device failure, maintaining safety in higher-voltage environments.
Q: Why is a three-pole configuration important for DH40000A?
A: It uses 3 poles which isolate all three phases simultaneously and further ensures complete power cutoff for three-phase servo motors.
Q: How does the DH40000A’s quick-make, quick-break mechanism benefit operations?
A: The DH40000A’s mechanism which executes rapid contact separation to minimize arcing. It prolongs contact life under frequent switching.
Q: What does the DH40000A’s 4000 A rating support in servo systems?
A: The unit’s 4000 A ampacity which sustains large motor inrush currents. It avoids nuisance trips during high-demand startup phases.
