# Instance: Field Devices — Electrical Metering & Integration (Kingsford BMS)

**WBS leaves served:** 2.6.1, 2.6.2, 2.6.3, 2.6.4, 3.5.3
**Module ref:** `_playbook/modules/bms/field-devices-power.md`
**Project:** Kingsford Hotel Bacolod BMS

## Project-specific parameter values

(Per A1 system="Power Metering" — chunk 8 — A-EE-001)

- `main_meter_count`: 3 (MTR-MAIN-1, MTR-MAIN-2, MTR-MAIN-3 at main switchgear)
- `sub_feeder_meter_count`: 10 (MTR-FDR-01..10)
- `total_meters`: 13
- `modbus_gateway_count`: 2 (1 at main switchgear room, 1 at distribution)
- `total_modbus_cable_m`: ~300 (Modbus daisy-chain trunks)
- CT sets per meter: 3 (3-phase)

## BOQ line items (Phase 6 input)

| WBS | Description | Qty | Unit | Reference |
|-----|-------------|-----|------|-----------|
| 2.6.1 | Multifunction power meter — Main switchgear class (Schneider PM-series, ABB M2M, Siemens SENTRON or eq.) | 3 | each | A1 MTR-MAIN-* |
| 2.6.1 | Multifunction power meter — Sub-feeder class | 10 | each | A1 MTR-FDR-* |
| 2.6.2 | Current transformer (split-core, sized per feeder ampacity) | 39 | each | 13 meters × 3 phases |
| 2.6.3 | Voltage transformer | 0 | each | Built-in for ≤690V meters; not separately required |
| 2.6.4 | Modbus serial-to-IP gateway | 2 | each | 1 per switchgear group |
| 2.6 | Modbus shielded twisted-pair cable (RS-485 trunk) | 300 | m | A3 ee_metering rows |
| 2.6 | DIN rail mounting hardware in switchgear / BMS panel | 13 | lot | per meter |
| 3.5.3 | Meter installation in switchgear (with EE coord) | 52 | hr | 13 × 4 hr |
| 3.5.3 | CT installation in switchgear (with EE coord) | 39 | hr | 39 × 1 hr |
| 3.5.3 | Modbus cable termination + bus testing | 7 | hr | 13 × 0.5 hr |
| 3.5.3 | Meter commissioning (registers verified, scaling correct) | 13 | hr | 13 × 1 hr |
| | **Total power-metering install + commissioning labor** | **111** | hr | |

## Open assumptions for this instance

- A-EE-001: meter count per A-004 — refine after Q-011 (full electrical drawing set)
- Brand: tier-1 metering — Schneider PM-series, ABB M2M, Siemens SENTRON
- BACnet IP-native meters preferred where available (eliminates Modbus gateway)
- CT supply: BMS Contractor for all 39 (sub-feeder + main) — per A1 c_o
- Coordination with EE contractor critical: switchgear cutouts must be made during switchgear assembly

## Cross-references

- **Working docs:** A1 (Power Metering chunk 8), A2 (meter equipment classes), A3 (Modbus trunk)
- **Assumptions:** A-004, A-EE-001
- **Clarifications:** Q-011 (electrical drawings), Q-013 (brand)