Function
Voltage trip
- ID
func:voltage-trip- IRI
https://solarlattice.org/kb/func/voltage-trip- Status
- active
- Also known as
- voltage protection, must-trip voltage, over/under-voltage trip, PTOV, PTUV, Shall trip, over-voltage trip point, under-voltage trip point
- Category
- Protection
- Function kind
- protection
Voltage trip disconnects the inverter from the grid when the voltage stays outside set overvoltage or undervoltage limits for longer than the set clearing time. Utilities can require their own settings. For example, PPL EU sets OV1 at 1.1 p.u. with a 2.1 s trip time and UV2 at 0.5 p.u. with a 0.6 s trip time.
<!-- review notes
- sentence 1: support check: partial - The passages show overvoltage and undervoltage trip thresholds with clearing times and a disconnection due to under-voltage. They do not explicitly describe the mechanism of disconnecting when the voltage stays outside limits for longer than the clearing time.
-->
Claims
trip_threshold
c1 verified · fact
nominal 1.2 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: OV2 shall-trip function, Category I and Category II; per-unit of nominal voltage; the setting is fixed at this value
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c3 (same source; check the conditions); possible conflict with c7 (same source; check the conditions); possible conflict with c11 (same source; check the conditions); possible conflict with c15 (same source; check the conditions)
c3 drafted · lead
nominal 1.1 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: OV1 default setting, Category I and Category II; per-unit of nominal voltage
review note: possible conflict with c1 (same source; check the conditions); possible conflict with c7 (same source; check the conditions); possible conflict with c11 (same source; check the conditions); possible conflict with c15 (same source; check the conditions)
c7 drafted · lead
nominal 0.45 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: UV2 default setting, Category I and Category II; per-unit of nominal voltage
review note: possible conflict with c1 (same source; check the conditions); possible conflict with c3 (same source; check the conditions); possible conflict with c11 (same source; check the conditions); possible conflict with c15 (same source; check the conditions)
c11 drafted · lead
nominal 0.7 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: UV1 default setting, Category II; per-unit of nominal voltage
review note: possible conflict with c1 (same source; check the conditions); possible conflict with c3 (same source; check the conditions); possible conflict with c7 (same source; check the conditions); possible conflict with c15 (same source; check the conditions)
c15 drafted · lead
nominal 0.5 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: UV2 default setting, Category III; per-unit of nominal voltage
review note: possible conflict with c1 (same source; check the conditions); possible conflict with c3 (same source; check the conditions); possible conflict with c7 (same source; check the conditions); possible conflict with c11 (same source; check the conditions)
c17 drafted · lead
nominal 1.1 UNITLESS
Conditions: PPL EU required OV1 shall-trip setting; per-unit of nominal voltage
review note: possible conflict with c19 (same source; check the conditions); possible conflict with c21 (same source; check the conditions); possible conflict with c23 (same source; check the conditions)
c19 verified · fact
nominal 1.2 UNITLESS
Conditions: PPL EU required OV2 shall-trip setting; per-unit of nominal voltage
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c17 (same source; check the conditions); possible conflict with c21 (same source; check the conditions); possible conflict with c23 (same source; check the conditions)
c21 verified · fact
nominal 0.88 UNITLESS
Conditions: PPL EU required UV1 shall-trip setting; per-unit of nominal voltage
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c17 (same source; check the conditions); possible conflict with c19 (same source; check the conditions); possible conflict with c23 (same source; check the conditions)
c23 drafted · lead
nominal 0.5 UNITLESS
Conditions: PPL EU required UV2 shall-trip setting; per-unit of nominal voltage
review note: possible conflict with c17 (same source; check the conditions); possible conflict with c19 (same source; check the conditions); possible conflict with c21 (same source; check the conditions)
c34 drafted · lead
nominal 110 PERCENT
Scope: products Generac pwrmicro proposed
Conditions: OV1 voltage trip, percent of nominal, Generac PWRmicro
trip_time
c2 drafted · lead
nominal 0.16 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: OV2 clearing time, Category I and Category II; the setting is fixed at this value
review note: possible conflict with c5 (same source; check the conditions); possible conflict with c13 (same source; check the conditions); possible conflict with c16 (same source; check the conditions)
c5 verified · fact
nominal 2 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: OV1 default clearing time, Category I and Category II
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c2 (same source; check the conditions); possible conflict with c9 (same source; check the conditions); possible conflict with c13 (same source; check the conditions)
c9 verified · fact
nominal 0.16 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: UV2 default clearing time, Category I and Category II
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c5 (same source; check the conditions); possible conflict with c13 (same source; check the conditions); possible conflict with c16 (same source; check the conditions)
c13 verified · fact
nominal 10 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: UV1 default clearing time, Category II
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c2 (same source; check the conditions); possible conflict with c5 (same source; check the conditions); possible conflict with c9 (same source; check the conditions); possible conflict with c16 (same source; check the conditions)
c16 drafted · lead
nominal 2 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: UV2 default clearing time, Category III
review note: possible conflict with c2 (same source; check the conditions); possible conflict with c9 (same source; check the conditions); possible conflict with c13 (same source; check the conditions)
c18 verified · fact
nominal 2.1 SEC
Conditions: PPL EU required OV1 shall-trip time
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c20 (same source; check the conditions); possible conflict with c24 (same source; check the conditions)
c20 drafted · lead
nominal 0.16 SEC
Conditions: PPL EU required OV2 shall-trip time
review note: possible conflict with c18 (same source; check the conditions); possible conflict with c22 (same source; check the conditions); possible conflict with c24 (same source; check the conditions)
c22 drafted · lead
nominal 2.1 SEC
Conditions: PPL EU required UV1 shall-trip time
review note: possible conflict with c20 (same source; check the conditions); possible conflict with c24 (same source; check the conditions)
c24 drafted · lead
nominal 0.6 SEC
Conditions: PPL EU required UV2 shall-trip time
review note: possible conflict with c18 (same source; check the conditions); possible conflict with c20 (same source; check the conditions); possible conflict with c22 (same source; check the conditions)
c27 verified · fact
nominal 13 SEC
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208; standard IEEE 1547 proposed
Conditions: VoltMaxTripT1, IEEE 1547 profile
verified by: review-workflowverified on: 2026-10-24
c28 drafted · lead
nominal 12.5 SEC
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208; standard CA Rule 21 proposed
Conditions: VoltMaxTripT1, Rule 21 profile
c29 drafted · lead
nominal 2 SEC
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: VoltMaxTripT1, ISO-NE profile
review note: possible conflict with c31 (same source; check the conditions)
c31 drafted · lead
nominal 0.16 SEC
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: VoltMaxTripT2 and VoltMaxTripT3 in IEEE 1547, Rule 21 and ISO-NE profiles
review note: possible conflict with c29 (same source; check the conditions)
c35 drafted · lead
nominal 13 SEC
Scope: products Generac pwrmicro proposed
Conditions: OV1 clearing time, Generac PWRmicro
setting_range
c4 verified · fact
1.1–1.2 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: OV1 allowable voltage settings, Category I and Category II; per-unit of nominal voltage
verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c8 (same source; check the conditions); possible conflict with c12 (same source; check the conditions)
c6 drafted · lead
1–13 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: OV1 allowable clearing time settings, Category I and Category II
c8 drafted · lead
0–0.5 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: UV2 allowable voltage settings, Category I, II and III; per-unit of nominal voltage
review note: possible conflict with c4 (same source; check the conditions)
c10 drafted · lead
0.16–2 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: UV2 allowable clearing time settings, Category I and Category II
c12 drafted · lead
0–0.88 UNITLESS
Scope: standard IEEE 1547-2018 proposed
Conditions: UV1 allowable voltage settings, Category II; per-unit of nominal voltage
review note: possible conflict with c4 (same source; check the conditions)
c14 drafted · lead
2–21 SEC
Scope: standard IEEE 1547-2018 proposed
Conditions: UV1 allowable clearing time settings, Category II; also UV2 clearing time range in Category III
c26 verified · fact
0–655 SEC
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: VoltMaxTripT1/T2/T3 overvoltage trip times
verified by: review-workflowverified on: 2026-10-24
c32 verified · fact
0–100 PERCENT
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: GridVoltMin1 level 1 undervoltage trip value, percent of nominal
verified by: review-workflowverified on: 2026-10-24
default_value
c25 drafted · lead
nominal 110 PERCENT
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: GridVoltMax1 (level 1 overvoltage) in IEEE 1547, Rule 21 and ISO-NE profiles
review note: possible conflict with c30 (same source; check the conditions); possible conflict with c33 (same source; check the conditions)
c30 drafted · lead
nominal 120 PERCENT
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: GridVoltMax2 and GridVoltMax3 in IEEE 1547, Rule 21 and ISO-NE profiles
review note: possible conflict with c25 (same source; check the conditions); possible conflict with c33 (same source; check the conditions)
c33 drafted · lead
nominal 88 PERCENT
Scope: products CPS SCA100K-T-US-480 / SCA50K-T-US-208
Conditions: GridVoltMin1 in IEEE 1547, Rule 21 and ISO-NE profiles
review note: possible conflict with c25 (same source; check the conditions); possible conflict with c30 (same source; check the conditions)
Referenced by
Data