Schneider P127BA0V6D3FE0 Protection Relay

Schneider MiCOM P127BA0V6D3FE0 Overcurrent and Earth Fault Protection Relay

Schneider MiCOM Px20 series 3-phase and earth fault comprehensive protection relay, Type B earth current input (1A rated), V6 voltage module (57-130V), D3 communication module (dual-port), FE0 output configuration (8 programmable relays). It supports 24-250V DC / 48-240V AC power supply with IP50 ingress protection. Applied for the protection of feeders, transformers, motors and other equipment in medium and low-voltage power systems. Part number: P127BA0V6D3FE0.

Model Segment Definition

Model Segment	Description
P127	Product series: MiCOM Px20 series, full 3-phase and earth fault protection relay
B	Earth current input type: Type B, rated current Ion=1A, measuring range 0.01–8 Ion
A0	Auxiliary function code: Standard configuration, no special extended functions
V6	Voltage module type: V6, input range 57-130V, compatible with PT secondary voltage
D3	Communication module type: D3 dual communication ports (front RS232 / rear RS485); supports Modbus / IEC60870-5-103 / DNP3.0
FE0	Output configuration: FE0 type, 8 programmable relay outputs (including 1 master trip output RL1)
P127BA0V6D3FE0	Schneider official part number, globally unique identifier

Full Version Technical Specification

Parameter Category	Specifications	Remarks
Basic Info	3-phase & earth fault protection relay, ANSI 50/51/50G/51G protection functions	For medium/low voltage feeder protection
Part Number	P127BA0V6D3FE0	Order strictly by this code
Dimensions	W144mm × H144mm × D190mm	Flush mount, fits standard 19-inch cabinet
Power Supply	24-250V DC / 48-240V AC	Wide voltage input for various power systems
Current Input	Phase current: 5A (standard) / 1A (optional); Earth current: 1A (Type B)	Accuracy class 0.2; measuring range 0.01–8× rated value
Voltage Input	57-130V (V6 module)	Matches PT secondary; phase/line voltage selectable
Protection Functions	Phase Overcurrent Stage I/II/III, Earth Overcurrent Stage I/II, Directional Protection, Auto-reclosing, Cold Load Pickup	8 setting groups for flexible configuration
Output Configuration	8 programmable relay outputs (RL1-RL8), RL1 as master trip output	Contact rating: 5A @ 250V AC / 30V DC
Communication Interface	Front port: RS232 (local commissioning); Rear port: RS485 (system communication)	Supports Modbus RTU, IEC60870-5-103, DNP3.0
Measurement Functions	Current, voltage, power, frequency, energy; dynamic average/peak value recording	250 event records, 25 fault records (1600Hz sampling)
Ambient Conditions	Operating: -25°C ~ +70°C; Storage: -40°C ~ +85°C; Humidity ≤95% (non-condensing)	Industrial grade for harsh environments
Certifications	CE, UL, CSA, IEC 60255	Complies with global power equipment safety standards
Service Life	Relay mechanical life: 10⁵ operations	Electrical life: 10⁴ cycles at rated load
Weight	Approx. 3.5kg	Lightweight for easy installation

MiCOM P127 Full Model List

Part Number	Model	Earth Current Input	Voltage Module	Communication Module	Output Configuration	Special Features
P127BA0V6D3FE0	P127	Type B (1A)	V6 (57-130V)	D3 (Dual-port)	FE0 (8 relays)	Standard feeder protection
P127AA0V6D3FE0	P127	Type A (5A)	V6 (57-130V)	D3 (Dual-port)	FE0 (8 relays)	5A phase current for standard CT
P127BA0Z1D3FE0	P127	Type B (1A)	Z1 (24-60V)	D3 (Dual-port)	FE0 (8 relays)	Low voltage module for special power supply
P127BA0V6D1FE0	P127	Type B (1A)	V6 (57-130V)	D1 (Single-port)	FE0 (8 relays)	Single communication port, cost-effective
P127BA0V6D3GE0	P127	Type B (1A)	V6 (57-130V)	D3 (Dual-port)	GE0 (12 relays)	Extended outputs for complex logic
P127BA1V6D3FE0	P127	Type B (1A)	V6 (57-130V)	D3 (Dual-port)	FE0 (8 relays)	With IRIG-B synchronization for precision time control
P127CA0V6D3FE0	P127	Type C (0.1A)	V6 (57-130V)	D3 (Dual-port)	FE0 (8 relays)	High-sensitivity earth input for low-current earthing systems

Replacement & Cross-Brand Comparison

4.1 Same Brand Direct Replacement

Original Model	Replacement Model	Description	Application
P127BA0V6D3FE0	P127BA0V6D3GE0	Upgraded to 12 relay outputs with expanded control capacity	Complex protection logic requiring more control outputs
P127BA0V6D3FE0	P127BA1V6D3FE0	Added IRIG-B time synchronization for higher timestamp accuracy	Power system fault analysis requiring precise time stamping
P127BA0V6D3FE0	P127CA0V6D3FE0	Upgraded to Type C high-sensitivity 0.1A earth input	Low-current earthing systems such as petrochemical and metallurgy
P127BA0V6D3FE0	P127BA0Z1D3FE0	Replaced with Z1 24-60V low voltage module	DC systems or special low-voltage power supply environments

4.2 Cross-Brand Equivalent Models

Schneider	ABB	Siemens	GE	Main Differences
P127BA0V6D3FE0	REF615	7SJ60	Multilin 369	Schneider cost-performance & flexible configuration
				ABB higher integration; Siemens richer protocol support
				Schneider 8 setting groups for multiple protection schemes
				GE larger event record capacity (500 records)

Application Environment & Industry Cases

Recommended Applications

Power System: Substation & distribution feeder protection up to 35kV

Industrial Automation: Motor, transformer and busbar protection in petrochemical, metallurgy, coal industries

Railway: Overcurrent & earth fault protection for traction power supply and station distribution

New Energy: Combiner box and inverter protection for PV and wind farms

Commercial Buildings: Standby power system protection for shopping complexes and data centers

Public Utilities: Power protection for pumping stations and water treatment projects

Typical Application Cases

Substation Feeder Protection in Chemical Park

Objective: Protect 10kV feeders against equipment damage and power outage caused by overcurrent & earth faults

Advantages: Wide voltage adaptability; 8 programmable outputs for complex trip logic; dual-port communication for remote monitoring

System Configuration: P127BA0V6D3FE0 + 10kV Vacuum Circuit Breaker + SCADA System

Effect: Fault response <30ms; power outage duration reduced by 40%; power supply reliability improved

Motor Protection Scheme for Automotive Factory

Objective: Protect large stamping line motors against overload and earth faults

Advantages: Directional protection for fault location discrimination; auto-reclosing reduces transient fault impact; event recording facilitates fault analysis

System Configuration: P127BA0V6D3FE0 + MCC + Industrial Ethernet

Effect: Motor failure rate reduced by 25%; production line efficiency increased by 18%

Not Recommended Scenarios

High voltage system (>35kV): Use MiCOM P40 or higher series

UHVDC system: Not applicable; dedicated DC protection relay required

Strong electromagnetic interference environment: Additional electromagnetic shielding required to avoid measurement deviation

Underwater / Humid outdoor environment: IP50 only suitable for indoor dry locations; outdoor installation requires protective enclosure

Installation & Wiring Guidelines

Installation Requirements

Mounting Type: Flush mounting; panel cutout 138×138mm, front panel 144×144mm
Installation Position: Install inside control cabinet, avoid direct sunlight and high heat source; reserve ≥50mm clearance for heat dissipation
Wiring Standard: Current loop ≥2.5mm² copper cable; voltage loop ≥1.5mm² copper cable; separate routing ≥100mm between current and voltage wires
Earthing: Device earth terminal must be reliably connected; earth resistance ≤1Ω linked to station earthing grid
Communication Wiring: RS485 uses shielded twisted pair; single-end shielding grounding; max communication distance 1200m

Core Terminal Definition

Terminal No.	Function	Type	Remarks
L1/L2/L3	Phase Current Input	5A/1A	Connect CT secondary, pay attention to polarity
IN	Earth Current Input	1A (Type B)	Connect residual CT secondary
UA/UB/UC/UN	Voltage Input	57-130V	Connect PT secondary; phase/line voltage optional
DC+/DC-	Power Supply	24-250V DC / 48-240V AC	Wide voltage with reverse polarity protection
RL1-RL8	Relay Output	NO/NC optional	RL1 master trip linked with trip indicator
COM1/COM2	Communication Port	RS232/RS485	COM1 front port; COM2 rear port

Commissioning Key Points

Parameter Configuration: Use MiCOM S1 Studio via RS232 to set CT/PT ratio, protection settings and communication parameters
Setting Group Selection: 8 setting groups switchable for different operation modes; Group 1 as default
Protection Function Test: Simulate phase overcurrent & earth overcurrent to verify action accuracy and response time
Communication Test: Verify Modbus / IEC60870-5-103 / DNP3.0 data transmission
Event Record Check: Confirm complete event & fault waveform records after fault triggering
Selection Rules & Quick Reference

Selection Mnemonic

Schneider P127 relay, full 3-phase earth protection,

Type B 1A earth input, V6 voltage 57-130V option,

D3 dual-port communication, FE0 with 8 relay operation,

24-250V wide power range, IP50 high protection graduation,

Order by P127BA0V6D3FE0, ideal for feeder station application.

Quick Selection Rules

Current Input: A=5A standard CT; B=1A high precision; C=0.1A high-sensitivity earthing
Voltage Module: V6=57-130V for PT secondary; Z1=24-60V for low voltage supply
Communication: D3=dual-port local+remote; D1=single-port cost saving
Output: FE0=8 relays standard; GE0=12 relays extended control
Special Function: Suffix “1” supports IRIG-B time synchronization
Application: Feeder=standard; Motor=with directional; Transformer=with cold load pickup
Air Freight Compliance & Certifications

Air Freight Compliance: No lithium battery / supercapacitor. Built-in electromagnetic components, compliant with IATA DGR Class 9 non-restricted goods, shippable as general cargo.

Certifications:

CE: IEC 60255, EN 61010

UL: UL 1053 Power Protection Standard

CSA: Canadian electrical safety approval

IEC 60255 Functional Safety certified by TÜV Rheinland

RoHS: EU RoHS compliant, free of hazardous heavy metals

Environmental Compliance: REACH regulation compliant

Purchasing & Logistics Info

Item	Details
MOQ	1 unit
Lead Time	Standard 8-10 weeks; Express 3-5 weeks
Packaging	Individual carton with manual, software CD and communication cable
Warranty	12 months after commissioning acceptance
Recommended Spares	Same model relay, relay output module, communication module
Matching Accessories	MiCOM S1 Studio, CT/PT, circuit breaker, communication switch

Schneider MiCOM Protection Relay Full Series List (Structured Version)

Schneider MiCOM protection relays consist of 8 platform series: Px10 / Px20 / Px30 / Px40 / Px60 / Px70 / Px80 / Px90. Covers feeder / motor / transformer / generator / busbar / line distance / differential protection. Supports Modbus / IEC60870-5-103 / DNP3.0. Applicable from medium-low voltage up to EHV power systems. Part number rule: PXXX[Function Code][Module Code].

Naming Rule Definition

Segment	Meaning	Example
P	Protection Relay identifier	P
XXX	Series Code:	P127 (Feeder), P241 (Motor)
	– P1xx: Feeder Protection
	– P2xx: Motor & Rotating Machine
	– P3xx: Generator
	– P4xx: Line Distance
	– P6xx: Differential (Transformer/Motor/Busbar)
	– P7xx: Busbar Protection
	– P8xx: Circuit Breaker Failure
	– P9xx: Voltage/Frequency Control
Function Code	Special function:	B=1A Earth; A1=IRIG-B
	– A/B/C: Earth current 5A/1A/0.1A
	– A0/A1: Standard / with IRIG-B
Module Code	Functional module:	V6, D3, FE0
	– V6/Z1: 57-130V / 24-60V
	– D1/D3/D5: Single/Dual-port/Ethernet
	– FE0/GE0/HE0: 8/12/16 relays
Full Part No.	Global unique code	P127BA0V6D3FE0

Series Classification by Application

2.1 Feeder Protection (P1xx)

Series	Model	Core Function	Current Input	Voltage Module	Comm.	Output	Typical Part No.
Px10 Basic	P111/P115/P116	Overcurrent + Earth Fault, Self-powered	5A/1A	None/Optional	None/D1	4-6R	P111A00V0D0FE0
Px20 Standard	P121/P122/P127	3-stage O/C + 2-stage Earth + Direction + Auto-reclose	5A/1A/0.1A	V6/Z1	D1/D3	FE0/GE0	P127BA0V6D3FE0
Px30 Advanced	P132/P139/P138	Feeder Management + ATS + Remote I/O	5A/1A	V6/Z1	D3/D5	GE0/HE0	P132AA0V6D5GE0
Px40 High-End	P141/P142/P143	Full feeder protection + Energy Metering + Fault Recorder	5A/1A	V6/Z1	D3/D5	HE0	P141CA0V6D5HE0

2.2 Motor & Rotating Machine (P2xx)

Series	Model	Core Function	Motor Type	Special Function	Part No. Example
Px20	P211	Motor Monitoring + Overload + Locked Rotor + Phase Loss	LV Motor	Temperature Monitoring	P211A00V0D0FE0
Px40	P241/P242/P243	Integrated Motor Protection + Start Control + Fault Diagnosis	MV/HV Motor	Positive/Negative Sequence + Thermal Model	P242AA0V6D3GE0
Special	P244	Synchronous Motor Protection + Excitation Control	Synchronous Motor	Out-of-step + Excitation Monitoring	P244BA0V6D3GE0

2.3 Transformer Protection (P6xx)

Series	Model	Core Function	Transformer Type	Differential Type	Part No. Example
Px30	P631/P632/P633	Transformer Differential + O/C + Earth + Temperature	2-winding / 3-winding	Ratio Differential	P632AA0V6D3GE0
Px40	P635/P636/P637	Advanced Transformer Protection + Winding Temp + Buchholz	Power Transformer	Harmonic Restraint Ratio Differential	P635BA0V6D5HE0
Railway	P638	Railway OHL Differential Protection	Traction Transformer	Fast Differential + Directional	P638CA0V6D3GE0