ABB RET670 Applications Manual

3.4.14.2 Setting parameters
The function does not have any parameters available in the local HMI or PCM600.
3.4.15 Denial of service DOS
3.4.15.1 Application
The denial of service functions (DOSFRNT, DOSOEMAB and DOSOEMCD) are
designed to limit the CPU load that can be produced by Ethernet network traffic on the
IED. The communication facilities must not be allowed to compromise the primary
functionality of the device. All inbound network traffic will be quota controlled so that
too heavy network loads can be controlled. Heavy network load might for instance be
the result of malfunctioning equipment connected to the network.
DOSFRNT, DOSOEMAB and DOSOEMCD measures the IED load from
communication and, if necessary, limit it for not jeopardizing the IEDs control and
protection functionality due to high CPU load. The function has the following outputs:
• LINKUP indicates the Ethernet link status
• WARNING indicates that communication (frame rate) is higher than normal
• ALARM indicates that the IED limits communication
3.4.15.2 Setting guidelines
The function does not have any parameters available in the local HMI or PCM600.
3.5 Differential protection
3.5.1 Transformer differential protection T2WPDIF (87T) and
T3WPDIF (87T)
1MRK504116-UUS C Section 3
IED application
97
Application manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24