1. Overall Structure and Core Components
250A Powerlock Three-Phase Four-Wire Input Interface
Configured with 4-pole Powerlock male and female plugs: green (PE ground), gray (L1), red (L2), brown (L3), blue (N neutral), rated current carrying capacity 250A, 360–415V three-phase AC; Equipped with dedicated yellow-green grounding locking terminals, cabinet equipotential grounding busbar, meeting temporary power grounding specifications; Marked "250A POWERLOCK INPUT," serving as the main power input for the entire unit, connecting to upstream generator sets/municipal temporary high-voltage connection boxes.
Built-in molded case circuit breaker (MCCB): 250A main incoming line protection, instantaneous short-circuit tripping, long-delay overload tripping.
2. Metering Module (Upper Right Area of METER) Digital multi-functional power meter with integrated monitoring functions:
Quantifiable data acquisition: Three-phase voltage L1/L2/L3, three-phase current, active/reactive power, cumulative electricity consumption (kWh), power factor; Local digital visualization readings to meet the needs of large-scale event electricity billing, load control, and overload warning.
3. Branch Output Socket Matrix
(1) Small 32A Industrial Socket Group (Upper Two Layers: S1–S6)
S1-L1, S2-L2, S3-L3: 3 blue 3P+N+PE 32A single-phase industrial sockets (230V lighting, sound control, small equipment);
S4, S5, S6: 3 red 3P+PE 32A three-phase industrial sockets (400V small stage lighting, power amplifier equipment);
Each socket is independently equipped with a miniature circuit breaker + residual current device (RCD 30mA personal protection).
(2) High-Power Powerlock Branch Outputs (Middle and Lower S7–S10)
4 independent 250A Powerlock output circuits (S7/S8/S9/S10), red large-diameter Powerlock female connectors, each circuit has an independent molded case circuit breaker for separate control, used for high-load three-phase equipment such as stage screens, large line array speakers, and heavy stage machinery, with a maximum single-circuit load capacity of 250A three-phase load.
4. Safety Signs and Accessories
High-voltage warning sign: DANGER 360-415V VOLTS; Equipotential grounding terminal for cabinet, door lock protective structure, splash-proof sealed door frame;
Complete Application Process for Temporary Industrial Power Supply
Step 1: Upstream Power Connection
Connect generator/municipal temporary high-voltage box to the cabinet's bottom 250A Powerlock input via heavy-duty Powerlock cables. Secure locking and full grounding, then switch on the main incoming breaker.
Step 2: Hierarchical Load Distribution
Low-power gear (control consoles, PCs, stage auxiliary lights): S1–S6 32A industrial sockets; max single-circuit load: 22kW 3-phase /7.5kW single-phase.
High-power stage gear (LED walls, line arrays, stage lifts, special effect gear): Four independent 250A Powerlock outlets S7–S10 for separate heavy-load control.
Step 3: On-site Maintenance & Safety Control
Routine check: Monitor real-time voltage, current and power consumption via the built-in meter to avoid overload.
Fault isolation: Only the faulty branch trips upon leakage/short circuit; main power remains on for other loads.
Post-event procedure: Cut off branch breakers sequentially → shut main switch → detach Powerlock cables, seal and transfer the cabinet.
Typical Scenarios
Outdoor music festivals, touring concerts, sports opening/closing ceremonies, outdoor expos, on-location film shoots, temporary construction high-power supply.
FAQ:
1: What's the maximum total power this temporary distribution unit can support?
Rated input current is 250A under 415V three-phase system; total maximum load reaches ~179.7kW. Each S7–S10 Powerlock branch separately bears up to 250A three-phase heavy loads, while S1–S6 32A sockets limit single-circuit load to 7.5kW single-phase / 22kW three-phase.
2: What environment is this stainless steel cabinet suitable for outdoor use? What's its protection rating?
The enclosure is 304 stainless steel with IP54 ingress protection. It works stably at ambient temperatures from -15℃ to +50℃, resistant to splashing rain and dust. Its IK10 impact resistance handles frequent transport bumps, and mild salt spray resistance supports coastal outdoor events. It cannot be deployed under continuous heavy submersion or heavy acid/alkali corrosive environments.
3: Why adopt dual outlet types (32A industrial sockets + 250A Powerlock)?
It realizes full load coverage for temporary events:
32A S1–S6 sockets serve low-power auxiliary equipment such as lighting consoles, laptops and small stage lamps;
Four independent 250A Powerlock outputs (S7–S10) match high-power gear including large LED screens, line array audio systems and stage lifting rigs, avoiding single-circuit overload and simplifying cable wiring for heavy loads.
4: How does the cabinet ensure safety when short circuit or electric leakage occurs?
It applies hierarchical isolated protection:
Every branch fits independent MCB and 30mA RCD for personal electric shock protection;
A 250A MCCB serves as the main incoming protection with 10kA short-circuit breaking capacity;
Fault tripping only cuts off the defective branch instead of the whole cabinet, keeping other equipment powered on without full-site blackout.
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